单项选择题
The fireman managed to ______ the fire in time.
A.extinguish
B.prevent
C.stop
D.ruin
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单项选择题
Before the first non-stop flight made in 1949, it ______ necessary for all planes to land for refueling.
A.would be
B.has been
C.had been
D.would have been
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单项选择题
Every four years, athletes from all over the world compete in the Olympics. Each country sends teams of its best athletes to ______ the games.
A.enter in
B.go into
C.take part
D.participate in
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