1． --- Mary’s got crazy and has been sent to the mental hospital. 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
2． There was ______ time _____ Chinese used foreign oil.
A. a; when B. a; while C. /; when D. /; while
