Question

13. ______ is known to the world，Mark Twain is a

13. ______ is known to the world，Mark Twain is a great American writer.
A. It
B. As
C. Which
D. That

Answer 1

B

As 引导非限制性定语从句， 代替整个主句Mark Twain is a great American writer
which 引导的非限制性定语从句不能放在主句前

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这几个题目呢