问题补充:
—Why was he late for school?
— his bike was broken on the road.
A. Since
B. Because
C. As
D. Because of
答案:
A. Since
(答案→)B. Because
C. As
D. Because of
解析:A. Since自从 B. Because因为 C. As 当…时候 D. Because of由于;句意:他为什么上学迟到?因为他的自行车在路上坏掉了。Because因为,后接从句,而Because of由于,只作为介词短语,后面不接从句,故选B