A．sinceB．whileC．whetherD．when
A. since
B. while
C. whether
D. when
查看答案
A．They smile to cover embarrassment.B．It is an unusual and even suspicious behavior.C．
A. They smile to cover embarrassment.
B. It is an unusual and even suspicious behavior.
C. They smile to show politeness.
D. It is an expression of pleasure.
【S13】
A. over
B. out
C. off
D. away
A．importantB．commonC．excitingD．unusual
A. important
B. common
C. exciting
D. unusual
A．Fresh fruit.B．A gift certificate.C．Homemade candy.D．A wedding present.
A. Fresh fruit.
B. A gift certificate.
C. Homemade candy.
D. A wedding present.
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