A number of books ______ been stolen from the library since the beginning of this term and the number _____ as large as 500.
| A．have; are | B．has; is | C．has; are | D．have; is |
He admitted ______ his best friend , Jack, _______to make up for that.
| A．betraying , determining | B．betraying , determined |
| C．to betray , determining | D．to betray , determined |
Jumping out of _____ airplane at ten thousand feet is quite ______ exciting experience .
| A．不填；the | B．不填；an | C．an；an | D．the；the |
-- Mr. White, will you please teach me how to perform pair skating today?
-- . You have to practise single skating well first.
| A．Two heads are better than one. | B．Think twice before you do. |
| C．Learn to walk before you run. | D．One today is worth two tomorrows. |
________ there is no restriction on foreign entries at the film festival ，those that win are in minority.
A. unless B. When C Where D while
________ seems to be a strong competition in China for senior high students to enter college or university.
| A．It | B．This | C．That | D．There |