5.他说的话很难理解。 

What he said is difficult        .

4.他发现他很难戒烟。   

He found        .

3.她就是用那种办法解决了问题。

That was the        .

2.我们付不起这个价钱。

We can’t        .  

1.嗯，要是如此，我们就得从头再来了。 

Well,          ，we will be back to square one.

5. The secretary        (记录) what her boss asked her I to do. 

4. She        (保持纪录) for the 100 metres.

3. Many factors        (对......有影响) American pronunciation. 

2. Don’t        (混合水果) the rest of the mixture.

1. The children        (被分成) three groups.