As the world’s population _____ becoming ______, we have to do something to change the situation.
| A．is, bigger and bigger | B．are, bigger and bigger |
| C．are, more and more | D．is, more and more |
The government will_______ more colleges for more students to receive higher education.
| A．set up | B．send up | C．set out | D．use up |
---Do the Smiths live next door to you?
---No, but they _________.
| A．used to | B．used to do | C．are used to | D．used to be |
— ______ go to the theatre together with me?
— Good idea!
| A．How about | B．Why do you | C．Why not | D．What about |
–– When did they arrive?
–– They ______two hours ago .They ______ here for two hours .
| A．arrived; have arrived | B．arrived; have been |
| C．got; have been | D．reached; have reached |
----It’s important_____ a foreign language.
----I agree with you. We should study hard.
| A．of us to learn | B．for us to learn | C．of us learning | D．for us learning |