—May I use your computer, Mr WU? —______．
| A．Yes, you may not | B．No, you may | C．Yes I may | D．No, you may not |
—Let’s go dancing tonight.!
—Sorry, I ________.I have to go to my guitar lesson.
A. mustn’t B. needn’tC. can’t
Listen! Someone _________ for help!
A. called B. is calling C. has called
I am going to make ________special house for my pet pig this weekend.
A. an B. a C. the
Healthy food and exercise help ________to study better.
A. us B. we C. our
I think _____ is very important for students to study by themselves in the school or at home.
A. it B. this C. that