—— What’s wrong with Tom? —— Bad luck! Tomhis bike and hurt his leg.A. fellB. fell offC. f

问题补充：

—— What’s wrong with Tom?

—— Bad luck! Tomhis bike and hurt his leg.

A. fell

B. fell off

C. fell down

D. fell behind

答案：

A. fell

B. fell off

C. fell down

D. fell behind

解析：考查动词。Fell摔倒；fell off从……摔下来；fell down跌倒；fell behind 下降退后。句意：汤姆怎么了？很糟糕！他从自行车上摔下来，伤到了腿。 1. fall down强调的是“滑倒、倒下”，后接宾语时应加上介词FROM。The boy hit the tree to hard that he fell down.男孩重重地撞在树上，结果自己倒下了。 2.fall off强调的是“跌落、从……掉下来”，后直接接宾语。The girl is falling off the bike. （= The girl is falling down from the bike.）女孩正从自行车上摔下来。故选B项。