题目内容
( ) 9. ―Mary was heard just now. What happened?
―John was telling a joke.
A. cry B. to cry
C. laugh D. to laugh
9. D考查动词不定式的用法。感官动词 (feel,hear,see,watch等) 和使役动词(make,let,have等) 的宾语补足语在主动语态中都不带to ,但是在变为被动语态后要加上to。根据语境可知选 D.
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