单项选择题

The high-speed trains can have a major impact on our lives.

A. effort
B. problem
C. influence
D. concern
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单项选择题
Our lives are intimately bound up with theirs.()

A. tensely
B. nearly
C. carefully
D. closely
单项选择题
If wool is submerged in hot water, it tends to shrink.
A．smell
B．fade
C．unravel
D．contract
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