单项选择题

A．Winding the watch.
B．Stopping the watch.
C．Setting the watch by the radio.
D．Asking Mary about the time.
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单项选择题
A．Because his watch has stopped.B．Because his watch is slow.C．Because his watch is fast.D．Because his watch is lost.
A．Because his watch has stopped.
B．Because his watch is slow.
C．Because his watch is fast.
D．Because his watch is lost.
单项选择题
The article was written to explain______.
A．the greenhouse effect
B．the solar effects on the earth
C．the models of solar weather interactions
D．the causes affecting weather
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