Don’t take his remarks too seriously. He was so sad that I don’t think he really what he w

问题补充：

Don’t take his remarks too seriously. He was so sad that I don’t think he really what he was saying.

A. knew

B. knows

C. besides

D. therefore

答案：

(答案→)A. knew

B. knows

C. besides

D. therefore

解析：句意：不要对他所说的太认真。他是如此悲伤的以至于我认为他真的不知道他在说什么。think后接宾语从句，宾语从句是的时态用一般过去时，故选A