I have ______ in learning chemistry. Could you helpme with it— Sure, I’d love to.

There are lots of islands the coast of Canada, and Shanghai is a famous harbor the east coast

_____ food is hard to find, few birds remain throughout the year.

Have you ________ him to keep good hours —Yes, I have. But he doesn’t listen to me.

This kind of on-line game _______ a group of teenagersin China.