40. This passage is mainly about______________
A) relations between the employer and employees
B) Jack Welch's view of business management
C) development history of GE company
D) courses taught in business schools
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Sorry I didn't hear the ring. I in the kitchen when you phoned.
A. must have been
B. must be
C. can be
D. could have been
You her in her office last Friday; she's been out of town for two weeks.
A. needn't have seen
B. must have seen
C. might have see
D. can't have seen
You can reuse those _________when you make your own jam this summer.
We have turned into a _______that produces a lot of garbage.
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