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.

 When did your father ___________ your mother? 

--- You were out when I went to visit you yesterday.---Oh, I________ for a friend from England at the airport. 

 Everyone except Tom and Jim ________ the film twice.

It is impossible to please everyone. We can only do our best