单选题
Many a student and teacher ______ making a careful study of ______ own problems.
A、
are...their
B、
is...their
C、
are...is
D、
is...his
【正确答案】
D
【答案解析】
[分析] 本题测试点为主语与数的用法。“many a+单数名词”做主语时,谓语动词用单数形式。例如: Many a man believes the story.许多人相信那个故事。
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