【题目】I don't know whether the books __________ to the homeless children next month are really useful.
A. given B. to be given
C. giving D. which were given
在线课程【答案】B
【解析】句意：我不知道将于下月送给无家可归的孩子们的书是否真的有用。根据next month可知名词the books后作定语的非谓语动词在谓语动词之后发生，故用动词不定式，因为books和give有被动关系，故用动词不定式一般式的被动式，所以B项正确。