Jack is the right person you can rely on to ____ the research when you are on vacation for the next two weeks.
| A．carry on | B．focus on |
| C．take up | D．insist on |
He had promised me to come to the party, and _____.
| A．so did he | B．so he did |
| C．so he would | D．so would he |
The country life he was used to _____ greatly since the opening policy.
| A．change | B．has changed |
| C．changing | D．having changed |
He went there, _____ some books and call on an old friend of his.
| A．bought | B．buying | C．buy | D．to buy |
It is the first time that you have come to China, _____?
| A．haven’t you | B．isn’t it |
| C．hasn’t it | D．aren’t you |
— Shall I go and buy two more bottles of beer?
— No, I’ve already bought twenty. That _____ be enough for us two.
| A．can | B．may | C．ought to | D．might |