—Could we put off the party?— , I’m afraid, this is the only day everyone is available.
Many policemen and soldiers are _______ the forest _______ the prisoner escaping from prison.
Mr. Wang, who _____ in this city ever since thirty years ago, _____ a report for the last two years.
I won't tell the student the answer to the math problem until he on it for more than an hour.
---Will you tell us what you saw in the room?---Sure. _______ inside were lots of strange creatures with white skin and large black eyes.
I’ll never forget the time I taught English at the village school as a volunteer, has a great effect on my life.