单项选择题

They worked ______ the cost of the holiday and decided if they could afford it.

A．at
B．out
C．off
D．for
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单项选择题
The noise around was terrible, but I had to ______ it.
A．keep away from
B．keep up with
C．live with
D．live on
单项选择题
______ by the news of his father's death, he could hardly utter a word.
A．To be stunned
B．Stunned
C．To stun
D．Stunning
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