The family is a cooperative enterprise for which it is difficult to _____ rules, because each family needs to work out its own ways to deal with its own problems.
| A．set up | B．put down | C．keep up | D．lay down |
Choosing the right dictionary depends on __________ you want to use it for.
| A．what | B．why | C．how | D．whether |
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．ours1 |
It is none of your business __________ other people think about you. Believe yourself.
| A．how | B．what | C．which | D．when |
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 |
A warm thought suddenly came to me __________ I might use the pocket money to buy some flowers for my mother’s birthday.
| A．if | B．when | C．that | D．which |