问题：
. ------- What do you think of Harry, our new roommate?
-------- I am not sure, but he is always asking ______ questions.
a great many of B. a great many C. a great number D. a large amount of
. ------- What do you think of Harry, our new roommate?
-------- I am not sure, but he is always asking ______ questions.
a great many of B. a great many C. a great number D. a large amount of
参考答案：