------Excuse me, Sir , shall all the students repeat the exam.
------________. Only those who failed.
A. That’s right . B. I’m afraid not . C. Yes, of course. D. I’m not sure.
------Make sure you have turned off the air conditioners before going out.
------________________.
A. Heard it B. Made it C. Forgot it D. Got it
He was about to tell me the secret ＿＿ someone patted him on the shoulder.
A. as B. until C. while D. when
He is the only one of the students who ＿＿ a winner of three years.
A. is B. are C. have been D. has
The scientist did ＿＿ experiments to test the new drug.
A. a series of B. a good many of C. a great many D. a lots of
These plants are watered ＿＿ .
A. every a few days B. every third day
C. every others day D. each two days
