Question

__________ some maddals came to live in the sea is not

1. A.
   Which
2. B.
   Since
3. C.
   Although
4. D.
   How

Answer 1

D
該句的從句由疑問副詞how引導的主語從句。選項B、C中的since和a1though不能引導主語從句；選項A中的which雖能引導主語從句，但與some矛盾。