He is always too shy ___________speak English in front of his classmates.
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I noticed a foreigner ____ something to an attendant.
A. explains
B. explained
C. explanation
D. explaining
Pure water is a ____ for everyone to live.
A. need
B. must
C. have to
D. can
When you don't agree with somebody, you often _____.
A. nod your head
B. shake your head
C. shake your hands
D. cross your finger
This style has been out of fashion for ____________.
A. decades
B. year
C. decade
D. age