【2012山东德州】I enjoy fresh air so I always sleep with the window open _____ it is really cold.
| A．unless | B．when | C．if | D．since |
All of us find __________ difficult to do the exercise.
A. this B. it C. that
I don’t think he can read the new words so well, __________?
A. can he B. can’t he C. do you
—Must I come before 7:00 tomorrow?
—No, you ________.
A. needn’t B. mustn’t C. couldn’t
Our teacher often uses the Internet ________ he often sends emails.
A. or B. and C. but
My teacher is a friend of _________.
A. mother’s of Jim
B. Jim mother’s
C. Jim’s mother’s