题目内容
用所给单词的正确形式填空Grandfather was made (work) ________ over ten hours a day before the PRC was founded.
答案:to work
解析:
解析:
to work;使役动词make后作宾补的动词不定式一般不带to,但用于被动语态时,就要在动词不定式前加to,故应填to work。
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