I don’t think ________ possible to master a foreign language without much memory work.
| A．this | B．that |
| C．its | D．it |
It is well known to us all ____ China sent up a manned spaceship to outer space successfully last year.
| A．that | B．what | C．which | D．when |
The players expected there ____ more free time before coming back to the country from abroad.
| A．is | B．being | C．have been | D．to be |
Word has come ____ some excellent students will go on a study trip to Chicago next month.
| A．that | B．what | C．when | D．whether |
____ computers are of great benefit to the development of science and technology.
| A．The fact is what | B．That the fact is |
| C．What the fact is that | D．The fact is that |
____ puzzled the mother most was ____the son would never agree with her.
| A．What; why | B．That; how | C．Which; when | D．What; where |