Tom didn’t go hiking with his classmates his illness. A. becauseB. because ofC. asD. sinc

问题补充：

Tom didn’t go hiking with his classmates his illness.

A. because

B. because of

C. as

D. since

答案：

A. because

(答案→)B. because of

C. as

D. since

解析：句意：汤姆没有和他的同学一起去旅行，因为他生病了。Because因为，后接从句；because of因为，后接名词性短语；as作为；since自从。结合题意故选B。