China supplies more than 90 percent of the world’s rare earth metals, but its reserves only ________ about one-third of the world’s total.

— This computer doesn’t work.—Really? I will have it____ tomorrow.

Mr. Li will go to Guangzhou by air. His workmates are ______ him off at the airport.

Don't _________too late, or you'll be tired during daytime.

A lot of people will help you, so you _____________worry about the money.