1 . —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

2 . 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.

3 . 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

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

A．Find out

B．Look out

C．Work out

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

A．look out

B．get out

C．work out

7 . 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

8 . —I have trouble ________ the math problem.
—Why not ask Jim for help? He’s good at math.

A．finding out

B．thinking over

C．working out

9 . Life may be full of difficulties, but we should believe we can ________ any problem.

A．find out

B．look out

C．work out

10 . This math problem is so hard that I can’t ________. Please give me some advice.

A．look through it

B．work it out

C．find it out

D．put it on