You ______go and ask Lily . She ______know the answer.
| A．must, can | B．must, may | C．need, can | D．can, may |
It is the third time that he ________ the first prize in the competition.
| A．wins | B．won | C．has won | D．to win |
I don't like the pop singer's songs. In fact, I've trouble ________ the words of his songs.
| A．understand | B．to understand |
| C．understood | D．understanding |
________I was in trouble, he would come to help me out.
| A．Every time | B．The first time |
| C．for the first time | D．Next time |
—Tom loves surfing the Internet.
—______ and ______.
| A．So he does; so you do | B．So he does; so do you |
| C．He does so; you do so | D．So does he; so do you |
Over 20% of the students at that school _____ the habit of smoking, which is beyond imagination.
| A．is | B．are | C．has | D．have |