My father lost ____keys. Now he can’t get into the house, the office or the garage (车库).
| A．a pair of | B．a piece of | C．a cup of | D．a set of |
Why not _________?
A. encouraging her to study hard
B. to encourage her to study hard
C. encourage her to study hard
You had better not _______.
A. to play games B. play games C. plays games
I like sports, such as _______ and so on.
A. swim B. swiming C. swimming.
Miss Zhang teaches ______ Chinese.
A. my B. me C. Your
Teachers don’t allow students ________ other’s homework.
A. copy B. to copy C. Copied