—Thank you your great help. —You are .
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