单项选择题

Was it in 1969 ______ the American astronauts succeeded in landing on the moon

A．that
B．ever since
C．when
D．of which
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She is very popular ______ her classmates, for her deeds were wonderful of her age.
A．in
B．with
C．about
D．among
单项选择题
Hainan is China's second (large ______ island.
Hainan is China's second (large ______ island.
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