--- Thank you for reminding me of the time, or I late for the flight yesterday.
--- Don’t mention it.
A. will have been B. would have been
C. must be D. could be
--- Dad, have you seen my Christmas card?
--- ______ you painted last night? I’m afraid I haven’t seen ______.
A. One ; one B. The one ; it
C. One ; it D. The one ; that
______ to nuclear radiation, even for a short time, may influence genes in human bodies.
A. Having exposed B. Being exposed
C. To expose D. Exposed
--- Where will you start your work after graduation?
--- Mum, it’s not been decided yet. I ______ continue my study for a higher degree.
A. need B. must
C. would D. might
--- Is it convenient to you if I call you up at 9 o’clock tomorrow morning?
--- I’m afraid not. I ______ a meeting then.
A. will have attended B. was attending
C. will be attending D. am attending
--- Why didn’t you help the little boy?
--- Oh, he had struggled to his feet ______ I could run over and offered any help.
A. before B. after
C. when D. since
