17.____all the inventions have in common is ____they have succeeded.
问题描述:
17.____all the inventions have in common is ____they have succeeded.
A.What; what B.That; that C.what; that D.That ; what
答案是C没有疑问,什么从句?
答
What all the inventions have in common中的What引导的是主语从句,而后面的they have succeeded做的是表语只能用that引导~~