He wrote a letter to me _______ that his trip to Japan had been put off because of the bad weather.　

_______ a satisfactory operation, the doctor believed the patient would recover from his illness very soon.

_______ a satisfactory operation, the patient recovered from illness very quickly.

.The cars _______ in Beijing are as good as those _______ in Shanghai.

The graduating students are busy _______ material for their reports.

.He walked down the hills, _______ softly to himself.

.At this moment the bell rang _______ the end of class.　

The child sat in the dentist’s chair _______.　

Properly _______ with numbers, the books can be easily found.

　_______ the composition, John handed it to the teacher and went out of the room.