The man kept silent in the room unless _______.
| A．spoken | B．speaking | C．tospeak | D．spokento |
We can find out ________ all the excitement is about by playing QQ's “Happy Farm”．
| A．that | B．how |
| C．what | D．when |
I can't figure out ________ it is that makes him so difficult at school.
| A．how | B．what |
| C．why | D．which |
We all held the view ________ the book said was right.
| A．that what | B．what that |
| C．that | D．all which |
—How do you think I can make up with Jack?
—Set aside ________ you disagree and try to find what you have in common.
| A．what | B．where |
| C．whether | D．which |
So quickly are science and technology advancing ________ is a possibility today may be a reality tomorrow.
| A．which | B．what |
| C．that which | D．that what |