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
单项选择题
A．graduallyB．immediatelyC．successfullyD．usually
A．gradually
B．immediately
C．successfully
D．usually
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