Question

--- What do you think of Harry, our new roommate?
--- I am not sure, but he is always asking ______ questions and      them are very hard to answer.

1. A.
   a great many of; a great number of
2. B.
   a great many; many of
3. C.
   a great number; a great many of
4. D.
   a large amount of , many

Answer 1

B
考查短语“许多的，大量的”表达。a great many + 可数名词的复数，不用再加of，a great number of +可数名词的复数，a large amount of+ 不可数名词，句意：你认为哈利怎么样，我们的新同事。我不能确信，但是他总是问许多问题，他们的许多很难回答。所以选B。