Как правильно вставить предлоги? вставить this, these, that, are horses. a cow. ducks. a goat.

these are horses

this is a cow

those are ducks

that is a goat

1)these

2)this

3)those

4)that

Iam a teenager.  my name is *******. i’m a typical teenager. i study at the *th form of a secondary school and my favourite subjects are biology and chemistry. in the future i want to become a professional doctor. at the moment i’m working hard to pass the end of year exams. after that, i can choose either to continue studying at high school, or to enter a medical college. i prefer the latter, because that way i will be able to learn the basics of medicine earlier. apart from the choice of future career, teenagers have many other problems, for example, first love. last year i met a guy that i liked. i thought he was my first love, but he actually chose to date my best friend inna. it was a real shock for me and i felt frustrated. as time passed, i stopped worrying about it, but it still feels awkward seeing them together. another problem is the attitude of my parents towards my personal life. they want to know everything about me, my life, my friends, etc. from the one hand, i can understand their concern. after all i’m their only child. from the other hand, it’s depressing. it seems that i can’t even turn on my computer without their permission. they think that there is lots of harmful information online, so i need to be careful while surfing the net. i’m also not allowed to stay outside with my friends when it gets dark. i need to be home sharp at 10 pm. perhaps they know better than me about life. another typical teenage problem that i couldn’t avoid is large amount of homework. this year i‘ve studied almost without weekends to get good marks in main subjects. so, i think being a teenager is not easy, but it is an obligatory life stage for everyone.

Last year agent cute (had) a very interesting case. an english boy rob (had gone) to his pen friend misha in russia. his parents (came) to the detective agency for help. agent cute (worked) on the case. he went to russia and (found) misha and his family. they had a visitor from england — robin. agent cute (watched) the boys in russia and, when they (went) to england, he watched them in england. robin (was) from 1599. he came from the past because he (wanted) to take the stone of destiny from westminster abbey back to scotland. the two boys used a time tunnel and (swapped) places in time and agent cute helped them swap back! he (found) a note, it is the key to a family treasure.