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.