单项选择题

A) on C) after
B) upon D) over

A．on
B．upon
C．after
D．over
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单项选择题
A) slippery C) roundB) small D) big
A．slippery
B．small
C．round
D．big
单项选择题
A) Alternatively C) SurprisinglyB) Obviously D) Frankly
A．Alternatively
B．Obviously
C．Surprisingly
D．Frankly
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