单项选择题

Man closes his eyes quickly when a fly suddenly rushes to his face. We call it the ______ reaction of human being.

A．voluntary
B．stern
C．intrinsic
D．natural
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单项选择题
The report says someone is arrested at the border for______ swiss watches into England.
A．exporting
B．transacting
C．smuggling
D．transplanting
单项选择题
The mechanism that______ the turntable is broken. There has to be someone here to mend it this afternoon.
A．stirs
B．stimulates
C．revolves
D．steers
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