单选题 19.Mr. Brown had us______ reports all afternoon.
【正确答案】 A
【答案解析】have为使役动词,后接复合宾语,其中宾语补足语可以是不带to的不定式、现在分词或过去分词。不定式作宾补时,和宾语具有逻辑上的主谓关系,例如:The childrenwere surprised when the teacher had them close their books unexpectedly.老师突然让他们把书都合上,孩子们感到很惊奇。可见只有A最合题意。