To be an expert, a beginner needs to go through a series of _____ stages.
A. intermediate B. liberal
C. overall D. demanding
Men must consider eating, drinking, clothing and finding shelter _____ they can pursue entertainment and recreation.
A. until B. unless
C. before D. because
Sometimes, the kind of food we serve a person suggests _____ we show our gratitude.
A. when B. what
C. why D. how
—I heard Mr. Morgan would be here at 4:00 pm. next Thursday.
—No, he _____ at that time.
A. was boarding B. would be boarding
C. will be boarding D. is boarding
Repairs of historic buildings have to be _____ the original structure.
A. in sympathy with B. in search of
C. in response to D. in contrast to
After nine years working to protect Siberian tigers, Yang Jun _____ his efforts recognized at the annual award ceremony in Beijing where he was named a "wildlife protector".
A. had B. had had
C. has had D. has
