The park is far away from here indeed. It’s about ______ walk.
| A．a three hour | B．a three hour’s |
| C．a three-hours | D．a three-hour |
—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