The poor boy is in danger. We should do all we _____ help him out.

The computer was used in teaching. As a result, not only__________, but students became more interested in the lessons.

Look! The dress over there is so beautiful. I’ll take it.－You’d better ________first. I’m afraid it’s too short for you.

The students ages ____

I hear there will be a concert of Sun Yanzi. _____ will it start? — In two days.