单项选择题

This suitcase is ______ heavy for me to carry.

A．enough
B．very
C．so
D．too
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问答题
你跟你的朋友分别半年了，现写信谈谈你新的生活环境和学习情况。
单项选择题
______ evidence that language-acquiring ability must be stimulated.
A．There being
B．If being
C．It is
D．There is
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