Ответ:
9) be quiet! father is writing report now! he often writes reports about the results of his work.
10) take your umbrella. it's raining heavily.
11) it often rains in autumn.
12) the pupils are asking the teacher questions on the topic now.
13) this pupil seldom ask questions during the lessons.
14) den isn't sleeping now. he is preparing for his English test.
15) sandy usually doesn't come home late.