---There people using the Internet in the world. Do you know how many people there are?
--- It’s hard to say, because _______people increasing.
A. is a number of; the number of; is
B. are a number of; a number; is
C. is the number of; a number of; are
----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