问题描述：
___ funny___ you want to make a pen with a machine in it.Have a try.A.This is;that B.That is;that
___ funny___ you want to make a pen with a machine in it.Have a try.
A.This is;that B.That is;that C.It's;that D.It's;what
___ funny___ you want to make a pen with a machine in it.Have a try.
A.This is;that B.That is;that C.It's;that D.It's;what
问题解答：
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