Hot the night air was we slept deeply because we were so tired after the long journey.A.

问题补充：

Hot the night air was, we slept deeply because we were so tired after the long journey.

A. although

B. as

C. while

D. however

答案：

A. although

(答案→)B. as

C. while

D. however

解析：考查状语从句。hot是做从句的表语，提前说明从句时倒装，即as引导的让步状语从句中，要将从句中的表语，状语，或动词原形提到as之前，故选B。