Crusoe’s dog became ill and died made him very lonely.A. thisB. thatC. whichD. as

问题补充：

Crusoe’s dog became ill and died, made him very lonely.

A. this

B. that

C. which

D. as

答案：

A. this

B. that

(答案→)C. which

D. as

解析：本题考查非限制性定语从句。Which用来代替前面整个句子的含义。