单项选择题


A．number
B．percentage
C．part
D．population
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单项选择题
A．WatchedB．WatchingC．LookedD．Looking
A．Watched
B．Watching
C．Looked
D．Looking
单项选择题
A．worryingB．troubleC．botheredD．annoyance
A．worrying
B．trouble
C．bothered
D．annoyance
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