问题
选择题
Tom didn’t go hiking with his classmates ____ his illness.
A．because
B．because of
C．as
D．since
答案
答案：B
题目分析：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。
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