15.A number of books ______ been stolen from the library since the beginning of this term and the number _____ as large as 500.
—I’m going on diet these days. —In my opinion, you should havebalanced diet.
I ___________ through that bitter period without your generous help.
Frankly, I really doubt _________ he will pass the driving test, for he missed much training.
The book is worth _________.
Happily, the victories of our team came from the Asian Games in Guangzhou __________.