单项选择题
A.watched out
B.watched at
C.looked up
D.looked down
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单项选择题
A.firstB.lastC.longD.next
A.first
B.last
C.long
D.next
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单项选择题
A.graduallyB.immediatelyC.successfullyD.usually
A.gradually
B.immediately
C.successfully
D.usually
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