16. Please_________ all the figures to see how much they________.
A. add; add up to B. add up; add up to C. add up; add up D. add; add to
17.--- Mary’s got crazy and has been sent to the mental hospital(精神病医院). Did you tell her boss about that?
--- Yes, but I _____ her husband first.
A. should have told B. shouldn’t have told C. must have told D. needn’t have told
