I won’t call you, ______ something unexpected haappens.
| A．because | B．While | C．unless | D．while |
I’ m sure I can make myself _____, because I have improved my English greatly.
A. understand B. understanding C. Understood
The river has become much ______ than before because of the waste water.
A. dirty B. dirtier C. Dirtiest
----Do you know how the accident _______?
----Sorry, I don’t know.
A. come out
B. come into being
C. come about
-----I wish I _____ go into space some day.
----- I hope your dream _____ true.
A. could , will come
B. can , came
C. can , will come
_____ my father ______ my mother take good care of me. I love them so much.
A. Either; or B. Both; and C. Neither; nor