Part II Language Knowledge (45 marks)
Section A (15 marks)
Directions: For each of the following unfinished sentences there are four choices marked A, B, C and IX Choose the one that best completes the sentence.
21.Children，when by their parents, are allowed to enter the stadium.
A. to be accompanied B. to accompany
C. accompanying D. accompanied
【考点】考察状语从句和省略
【答案】D
【解析】本题考察的是状语从句的省略：当状语从句的主语和主句主语一致且含有be动词的时候，可以把状语从句的主语和be动词一起省略。本题在when的后面省略了they are。因为children和动词allow构成被动关系，所以使用过去分词表示被动。句义：当孩子有父母亲陪伴的时候，他们是被允许进入体育馆的。故D正确。
【试题延伸】本题考察是状语从句的省略，实际上可以把when也省略掉，就变成了非谓语动词中的分词做状语的用法。
