_______ hard work it is! I can’t do it by myself.
| A．How | B．What | C．What a | D．How a |
—Do you know ________ she went to the movie last night?
—On foot.
A. when B. why C. how
—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