The world’s population is getting larger and larger, so scientists will have to ______ new ways to solve food problem.
| A．catch up with | B．keep up with | C．come up with | D．make up with |
—My cousin often has nothing for breakfast, _____ she?
— _____. Because she often gets up late and is afraid of being late for school.
| A．has; Yes | B．doesn’t; No | C．does; No | D．hasn’t; Yes |
—Be quite, the head teacher Mr. Qian is coming.
—Don’t worry. It _____ be him. Mr Qian is much fatter.
| A．mustn’t | B．may not | C．needn’t | D．can’t |
This kind of books _____ well and they _____ out last week.
| A．sells; were sold | B．is sold; sold | C．sells; sold | D．is sold; were sold |
This morning the police ______ to the scene of the crime when it began to rain.
| A．would get | B．has got | C．have got | D．had got |
—How much are the two pairs of shoes?
—They are not expensive. I think fifty dollars ______ enough.
| A．is | B．are | C．were | D．was |