1 . We can’t ________ this math problem. Can you help us?

A．work out

B．put up

C．prepare for

2 . John couldn’t ________ the math problem so he was upset. (算出)

3 . Cindy felt very happy because she ________ the difficult math problem by herself.

A．worked out

B．found out

C．put out

D．care for

4 . —Jenny is ________ the difficult math problem.
—I’m sure she’ll ________.

A．working out; work it out	B．working on; work it out
C．working on; work it on	D．working out; work it on

5 . 仔细阅读下面五个句子，然后用下面方框中所给的单词或短语填空，使每个句子在结构、句义和逻辑上正确。 (提示：方框中有二个单词或短语是多余的。)

because / because of / making sure / provide / work out / pull / push

1. There were many times when Aron almost lost his life ________ accidents.
2. Do you want to stay with us to see how things ________?
3. His mom was ________ the flashlights and radio were working.
4. It’s the parents’ job to ________ a clean and comfortable environment for their children.
5. People shouldn’t ________ their kids so hard.

6 . These problems are too difficult to ________. I think we need some help from our teacher.

A．cut up

B．work out

C．keep away

D．hand out

7 . ________ and always be careful when you cross the street. Don’t put yourself in danger.

A．Find out

B．Look out

C．Work out

9 . Think it over, and you will be able to ________ the math problem.

A．look out

B．get out

C．work out

10 . Sandy is so excellent that she can often ________ all kinds of problems successfully.

A．look after

B．take up

C．work out

D．give away