The sun (to rise) in the east and (to set) in the west. 2. thank you,i (to feel) much better. 3. it (to snow) for the whole day,the garden is covered with snow. 4. i (to do)my homework for two hours and i (not to finish) it yet.5. i hope that they (to receive) my letter by saturday. 6. this is the house where i (to live) i (to live) here since childhood.7. tomorrow we (to ski) in the forest the whole day.8. the delegation (to start) for london as they (to receive) their visas. 9. he (to finish) his design last night. 10. my sister (to look) through the morning newspaper every day. 11. last sunday at 6p.m. i (to play) computer games while my younger brother (to read) comics. 12. they (to meet) each other again in two days. 13. i (to write) the english grammar test now. 14. he always (to do) his morning exercises with the window open. 15. we talked about what we (to do) since we left school.

Вот правильные формы глаголов для данных предложений:

1. The sun rises in the east and sets in the west. (Present Simple — общеизвестный факт).
2. , I feel (или am feeling) much better. (Present Simple или Present Continuous — текущее состояние).
3. It has been snowing for the whole day, the garden is covered with snow. (Present Perfect Continuous — действие началось в прошлом и продолжалось до настоящего момента, виден результат).
4. I have been doing my homework for two hours and I have not finished it yet. (Present Perfect Continuous для первого пропуска — процесс; Present Perfect для второго — результат с отрицанием «еще не»).
5. I hope that they will have received my letter by Saturday. (Future Perfect — действие завершится к определенному моменту в будущем).
6. This is the house where I live; I have lived (или have been living) here since childhood. (Present Simple для первого пропуска — постоянный факт; Present Perfect для второго — действие, начавшееся в прошлом и длящееся до сих пор).
7. Tomorrow we will be skiing in the forest the whole day. (Future Continuous — процесс, который будет длиться в определенное время в будущем).
8. The delegation started (или will start) for London as they had received (или have received) their visas. (Past Simple и Past Perfect, если речь о прошлом; Future Simple и Present Perfect, если о будущем).
9. He finished his design last night. (Past Simple — указано точное время в прошлом).
10. My sister looks through the morning newspaper every day. (Present Simple — повторяющееся действие).
11. Last Sunday at 6 p.m. I was playing computer games while my younger brother was reading comics. (Past Continuous — два параллельных процесса в определенный момент в прошлом).
12. They will meet each other again in two days. (Future Simple — предсказание или решение о будущем).
13. I am writing the English grammar test now. (Present Continuous — действие происходит в момент речи).
14. He always does his morning exercises with the window open. (Present Simple — привычка, регулярное действие).
15. We talked about what we had been doing (или had done) since we left school. (Past Perfect Continuous или Past Perfect — действия, предшествующие моменту разговора в прошлом).