Question

He couldn’t take part in the final exam _______ his serious illness.

1. A.
   because
2. B.
   lead to
3. C.
   because of
4. D.
   when

Answer 1

C
试题分析：考查短语用法。AD项后面要接句子。BC项后面要接名词或者名词短语。Lead to导致，通向；Because of因为，由于；句意：由于严重的疾病，他不能参加最后的考试。故C正确。
考点：考查短语用法
点评：because与when后面要接句子。Lead to和because of后面要接短语或者名词。