—What's your uncle's opinion about your decision?—He always encourages me to do I think I

问题补充：

—Whats your uncles opinion about your decision?

—He always encourages me to do I think I should.

A. what

B. when

C. how

D. that

答案：

(答案→)A. what

B. when

C. how

D. that

解析：A 考察主语从句，should后面省略了do，do的后面缺少宾语，故使用双重作用的what。