The population of Africa is ________ so rapidly as to cause concern of the whole world.
| A．expanding | B．circulating | C．exporting | D．spreading |
I remember ________used to be a quiet village.
| A．when | B．how | C．where | D．what |
________ the 2020 Olympic Games will be held in Beijing is not known yet.
| A．Whenever | B．If | C．Whether | D．That |
–I think it’s going to be a big problem.
--Yes, it could be.
--I wonder ________ we can do about it.
| A．if | B．how | C．what | D．that |
Little Tommy was reluctant to tell the schoolmaster _____ he had done the day before.
| A．that | B．how | C．where | D．what |
–You’re always working. Come on, let’s go shopping.
--________ you ever want to do is going shopping.
| A．Anything | B．Something | C．All | D．That |