---Do you know_______ the books on the shelves? --- Sorry, I can’t count them, because there are _______books. A. a number of; the number of B. a number of; a number C. the number of; a number of
----How long _________ she _______ this book ? ----She _________it from the library two weeks ago. A. has, kept; borrowed B. has, kept; lent C. has, borrowed; borrowed