1. other factors may affect the process. 2. these organelles may accumulate energy. 3. they must have underestimated the result. 4. they should have included other works in the review. перефразировать употребляя пассивный залог

1.The process may be affected by other factors.
2. The energy may be accumulated by these organelles.
3. The result must have been underestimated by them.
4. The review should have been included by them.

1The process may be affected by other factors.
2Energy may be accumulated by these organelles.
3The result must have been underestimated by them.
4Other works should have been included in the review by them.

1) I like London very much. - Я очень люблю Лондон.
2) Yes, I do. I like it here. - Да. Мне нравится здесь. 
3) I do not eat cheaps but I adore fish. - Я не ем чипсы, но обожаю рыбу. 
4) Yes, I watch educational programmes. - Да, я смотрю образовательные программы. 
5) In our country people must drive on the right side. - В нашей стране правостороннее движение. 
6) No, I don't. - Нет, у меня нет машины. 
7) No, I don't. - Нет.  
8) Yes, it's my favourite subject - Да, это мой любимый предмет. 
9) I love dancing and singing and I do it every day - Я люблю петь и танцевать и я делаю это каждый день.
10) Yes, I know him. He's Elisabeth ll eldest son and Prince William's father - Да, я его знаю 
11)Queen it is a famous music group- Квин это известная музыкальная группа 
12)Yes, The Beatles group is a very famous group - Да, Биттлз - крутая группа.
13) No, I don't. - Нет.

Hi David,
I am very happy to hear from you again. How are you? Remember you asked me about my life in Washington? You also said that you would like to visit it. I will tell you a little bit of my usual day.
My family consists of my mom and cat. In our free time we do not do anything special. We just lie in the bad and watch TV series. And what do you do in your free time?
My hometown has a lot of interesting sites and I hope you will like them all! There you can visit White House (But do not go to the fence very close, because you will be on the ground arested by police, FBI and even militaries. They will not joke with you), Natural History museum ( there were made films called Night in the museum), if you have enough money, you can buy huge candies in the most popular confectioner's and visit lots of another museums like Mseum of cosmonautics and aeronautics, where is shown the fastest military plane in the world.
Weather here is usually warm, so you won't got cold. I advice you to take T-shirts, shorts, flip flops and swimming costume. One time we will go sunbathing.
I need to go now. If you do not know where to stop, remember that I always near and I can meet near the and offer you one room in our apartment. Also my mom would like to know you better.
Sincerely yours, Markus