同义句转换。
1. A. Mrs Morison can sing very well.
B. Mrs Morison is very ________ ________ singing.
2. A. He arrived with a policeman shortly before 9:30.
B. He arrived with a policeman shortly before ________ ________ nine.
3. A.We should water the flowers every four hours.
B. The flowers should ________ ________ every four hours.
4. A. Do write the number down so that you won't forget it.
B. ________ sure to write the number down, ________ you many forget it.
5. A. The policeman said, "Don't play football in the street, children!"
B. The policeman asked the children ________ ________ play football in the street.
