I have to ____my diet rather than eat the same all the time.，so that I can keep fit.

   A. differ              B.vary               C. continue          D. range

三、Rewrite the following sentences(句型转换)5分

1.My cell phone is power off.I have to store power into it.

I have to _________ my cell phone fully _________ before I use it again.

2.If a medicine works with animals there is a high chance that it also works with people.

If a medicine has _________ _________ animals,it _________ _________ _________ that it has _________ _________people.

3.How do you feel about the animal experiments?

What do you _________ _________ the animal experiments?

4.Doctors can learn a lot of skills from working on animals.

Doctors can _________ more _________ from working on animals.

5.I think Maglev train costs too much money.

In _________ _________,Maglev train is _________ _________ expensive.

I'm going to Shanghai on business this afternoon, so I have to _______ my things now.

   A. turn up              B. set up            C. take up          D. pack up

----Mr. Johnson, would you have some more ice-cream?

----No, thanks. It’s very good, but I have to _____ my weight, you know.

A．remain               B．notice                  C．watch          D．care

I have to ____my diet rather than eat the same all the time.，so that I can keep fit.

A. differ              B.vary               C. contiune            D. range