China’s success in manned-space-craft travel shows _________ out country has become one of the greatest powers in space research.
| A．what | B．which | C．不填 | D．it that |
Having checked the doors were closed , and _________ all the lights were off, the boy opened the door to his bedroom.
| A．why | B．that | C．when | D．where |
It is none of your business _____ other people think about you. Believe yourself.
| A．how | B．what | C．which | D．when |
Why not try your luck downtown, Bob? That’s ______ the best jobs are.
| A．what | B．where | C．when | D．why |
You can only be sure of_________ you have at present; you cannot be sure of something _____ you might get in the future.
| A．that; what | B．what; / | C．which; that | D．/; that |
Why not try your luck downtown, Bob? That’s ______ the best jobs are.
| A．what | B．where | C．when | D．why |