__________ is really hard __ them to climb such a high mountain.
| A．This; to | B．It; to |
| C．This; for | D．It; for |
We should stop polluting the water.
A. making…clean
B. making…dirty
C. making…dry
Mary has a good time at school every day.
A. has fun B. enjoys playing C. studies hard
Tom can get a letter from his pen pal twice a month.
A. come from B. hear from C. hear of
Mrs Green is ________ mother.
A.Jim and Kate
B.Jim’s and Kate’s
C.Jim and Kate’s
We have ________ students.
A. fourty –four
B. four – fourty
C. forty – four