My friend and classmate Paul _____ motorcycles in his spare time.
A.race
B.races
C.is raced
D.is racing
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There _____ a pen, two pencils, and three books on the desk.
A.are
B.is
C.has
D.have
Climbing hills _____ of great help to health.
A.is
B.are
C.were
D.be
Time and tide _____ for no man.
A.wait
B.waited
C.is waiting
D.has waited
The injured in the tsunami _____ good care of by some medical teams.
A.is taken
B.are being taken
C.are taking
D.is being taken