The relationship ___________/bi’twi:n /Chinese and African people is important.

We’ll have a hiking trip, but when shall we meet? —Let’s make it ______ half past eight ______ the morning of June 21. [ ]

Your mother _______ take a bus to work?-Yes. But now she usually goes to work on foot.

In the future people can read books only _____ computers, not _____ paper.[ ]

The first thing ______my brother is going to do this afternoon is to write a letter.