Try she might Sue couldn’t get the door open.A. ifB. whenC. sinceD. as

问题补充：

Try she might, Sue couldn’t get the door open.

A. if

B. when

C. since

D. as

答案：

A. if

B. when

C. since

(答案→)D. as

解析：这是一个虚拟语气的倒装句，原句是As she might try,Sue couldn’t get the door open.意思是，即使她尝试了，她也打不开打扇门，as表示即使的意思。