He was so tired that he fell asleep he went to bed.A. as ifB. even thoughC. ever sinceD.

问题补充：

He was so tired that he fell asleep he went to bed.

A. as if

B. even though

C. ever since

D. as soon as

答案：

A. as if

B. even though

C. ever since

(答案→)D. as soon as

解析：考查状语从句。句意“他是如此的劳累，以至于一躺床上就睡着了。”A“似乎”；B“即使”；C“自从”；D“一......就......”。故选D。