单项选择题

The enemy was surrounded in the valley and it was difficult to ______.
A) break off C) break away
B) break through D) break out

A．The enemy was surrounded in the valley and it was difficult to ______.
B．break off
C．break through
D．break away
E．break out
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单项选择题
Westerners ______ bread, milk potatoes and etc. A) come on C) act on B) work on D) feed on
A．Westerners ______ bread, milk potatoes and etc.
B．come on
C．work on
D．act on
E．feed on
单项选择题
He made the suggestion at the meeting that the problem ______ by students themselves. A) is settled C) was settled B) be settled D) had been settled
A．He made the suggestion at the meeting that the problem ______ by students themselves.
B．is settled
C．be settled
D．was settled
E．had been settled
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