一Alex，go and clean your bedroom.
一I ________________ it.It's tidy and clean now.
A．have cleanedB．cleaned
C．clean
相关试题
We ___________ try our best to fight against pollution.（ ）
| A． |
should |
B． |
may |
C． |
mustn't |
D． |
needn't |
Tom wants you to visit him.Look at your plan on the right and complete the conversation.
| Tom：Can you come on Monday evening？ You：___________ |
（ ）
| A． |
Yes，sure.I'll come at 7:30. |
| B． |
Sorry,but I'm going to play volleyball. |
| C． |
No problem.We can go to the theatre with my mom. |
| D． |
Sorry,but I will work late that night. |
﹣﹣Do you mind telling me how to start this machine？
﹣﹣ . It's very easy. Do it like this.（ ）
| A． |
Yes， of course. |
B． |
No， not at all. |
| C． |
No， thanks. |
D． |
Yes， you are right. |
_______________you practice every day，you won' t make any progress.（ ）
| A． |
Although |
B． |
Unless |
C． |
If |
D． |
Since |
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