Teacher: okay children, today we are going to visit the zoo and there are some rules follow. first, you the animals. student: touch the animals? teacher: no, you you are not allowed to touch the animals because it's dangerous.

1 must

2 mustn't

3 may

4 may not

Объяснение:Teacher: Okay children, today we are going to visit the zoo and there are some rules we must follow. First, you can feed the animals.

Student: Can we touch the animals?

Teacher: No, you can't. You are not allowed to touch the animals because it's dangerous.

Да, глаголы talk and laugh могут использоваться с окончанием ing.
Только эти глаголы не имеют формы с ing окончанием

глаголы эмоционального состояния:
to wish желать
to desire желать
to want хотеть
to envy завидовать
to hate ненавидеть
to like нравиться
to love любить
to prefer предпочитать
to fear бояться
to need нуждаться
to satisfy удовлетворять
to seem казаться

б) глаголы мыслительной деятельности:
to agree соглашаться
to believe верить
to deny отрицать
to doubt сомневаться
to expect полагать
to forget забывать
to know знать
to recognize узнавать
to remember помнить
to respect уважать
to suppose предполагать
to think* считать/полагать
to understand понимать

в) глаголы ощущения:
to hear* слышать
to see* видеть
to taste* иметь вкус
to smell* пахнуть

г) глаголы обладания, отношения
to be быть
to consist состоять
to belong принадлежать
to contain содержать
to have иметь
to include заключать в себе
to possess обладать
to own владеть и др.

(Взято с English Help сайта, "Глаголы, не имеющие форм Continuous")

В Вашем случае будет 

They were talking and laughing at 4 o'clock yesterday.

1)Match the words on the left and the endings on the right.
entertainment  
attraction
chatter     
camper 

2)Choose the words to fill in the gaps.
She has been working for this company for two years.
Get out of here! This place is not for walking dogs.
Don’t give away my secrets, please.

(3)Choose the right variant.
1) They are leaving for Paris tonight. I have already bought a ticket.
2) I think we will win the game.
 
(4)Choose the right variant.
She was born on July 15th.
There is a book on the table.
I haven’t got any books on art at home.
My friend was born in September.

вариант 2(1)Match the words on the left and the endings on the right.
traveller  
attraction 
encouragement 
chatter 

(2)Choose the words to fill in the gaps.
Kate is working on her essay now.
We should work out a set of rules.
On holiday I usually don’t get up early.

(3)Choose the right variant.
1) My brother is getting married this weekend.
2) I think you will enjoy the party. 

(4)Choose the right variant.
He was born on May 20th.
I am sitting on the bench.
I was born in April.

3 вариант(1)Fill in the articles when necessary.
The Sahara Desert
 6. Everest
The Red Sea
 7. the Urals
the Mississippi 
8. the Bering Strait
Sakhalin 
9. South America
the Russian Federation
 10.  France

(2)Change the verbs into adjectives or nouns and translate into Russian:
arrange – arrangement (приведение в порядок) 
2. protect - protection (защита)  
3. avoid - avoiding (избегание) 
4. eat - eatable (съедобный)
 5. crash - crasher (грохот) 

(3)Fill in for, on, by when necessary.
I prefer travelling by air.
2. I am leaving from Samara to Moscow.
3. He likes to travel by foot.

(4)Fill in reflexive pronouns.
He can take care of himself .
My friends can take care of themselves .
We can take care of ourselves.

(5)Say how you feel about the following choices. Use I would rather … , I would prefer+ noun, I would prefer+ infinitive.To travel by train or by plain

I would rather travel by plain.

4 вариант
(1)Make up conditional sentences:
He will play the guitar if he does his homework.

(2)Choose the right variant to complete the sentences:
1. He can communicate successfully.
2. We remember these friendly people. 
3. It’s not my bag. It’s hers.

(3)Write the sentences in reported speech:
1. He said to clean the room.
2. He said not to clean the room.
3. He said that he would play chess.
4. He asked when I cooked dinner

(4)Translate into Russian:
1. They don’t get along with each other. Они не могут ужиться друг с другом
2. The concert is put off till next week. Концерт отложен до следующей недели.
3. You can relax. Ты можешь расслабиться.

5 вариант(1)Make up conditional sentences:
She would write to him if she knew his address

(2)Choose the right variant to complete the sentences:
1. She is a successful businessman. 
2. She spoke very confidently
3. My idea is much better than yours

(3)Write the sentences in reported speech:
1. She said to go to school
2. She said not to go to school
3. She said that the doctor would come at 5.
4. She asked Masha why she cried

(4)Translate into Russian:
1.The bus driver will tell you where to get off. Водитель автобуса скажет тебе, где (тебе) выходить
2. The girl put down her blue dress. Девочка надела cвое голубое платье
3. He always supports me. Он всегда поддерживает меня