Mr. Green told us _____ turn the lights off when we leave the classroom.

A. not forget to B. not to forget

C. not to forget to D. to forget not to

—What were you and your cousin doing at this time yesterday?

—He was reading a magazine ________ I was writing an e-mail.

A. as B. while C. when D. after

We should encourage our students ________ hard instead of ________ too much time playing games.

A. work; spend B. to work; spend

C. work; spending D. to work; spending

—________ does she weigh? —Her ________ is 50kg．

A. How heavy; weigh B. How many; weight

C. How much; weight D. How much; weigh

—I’m sorry, Mr Li. I ________ my exercise book at home.

—Oh, don’t forget ________ it here tomorrow, please.

A. left; to bring B. forgot; to bring

C. left; to take D. forgot; to take

I find this Math problems very _____ _. I believe the students can work it out .

A. easily; easy B. easy; easily

C. easily; easily D. easy; easy

—He doesn’t like making friends with other people, does he?

—___. He always stays at home and never says anything about himself.

A. Yes, he does. B. Yes, he doesn’t.

C. No, he does. D.No,he doesn’t.

Girls, I will tell you ________, and you can finish it ________.

A. what to do; on your own B. what to do; by yourself

C. how to do; by yourself D. how to do; alone

“The clouds became dark.” The sentence structure is ________.

A. S+V+IO+DO B. S+V+DO+OC C. S+V+DO D. S+V+P

Newton was playing under an apple tree ____ an apple fell onto his head.

A. when B. while C. after D. before