单项选择题

It was so noisy that we found it hard to（）the conversation.

A．carry on
B．set for
C．turn on
D．go about

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Jack(quick)（）established himself as a powerful member of the new company.
单项选择题
We are delighted at the news（）they have started the business cooperation you’re your company.

A．that
B．when
C．which
D．what
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