问题描述：
various 与 variety
一题如下：
sound can be produced from __ string instruments.
A various of
B variety of
C a various of
D a variety of
选什么和为什么 thanks
还有其余的为什么不对
一题如下：
sound can be produced from __ string instruments.
A various of
B variety of
C a various of
D a variety of
选什么和为什么 thanks
还有其余的为什么不对
问题解答：
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