The earth will become worse and worse ________ we do something to stop her from being polluted.

A. if           B. even if             C. when               D. unless

I _______ riding my bike________ taking buses to school.

A. prefer; to          B. prefer; rather than

C. would like; to      D. would rather; than

— Can you come and play football with me?

—______. I have a lot of homework to do.

A. Excuse me         B. I’d like to

C. I’m afraid not   D. It’s a pleasure

Soft colors like pink and light blue make people _______, so they spend more time _______their meals.

A. relax; eat          B. relaxed; ate

C. relaxed; eating     D. relaxing; eating

I was late today because alarm clock didn’t _______ .

A. run off        B. go off

C. give out        D. give up

By the time I got to school, I realized that I ________ my pen at home.

A. have forgotten      B. have left

C. had forgotten      D. had left

— What _______ your bike yesterday?

— It didn’t work.

A. was happened in     B. happened in

C. was happened to   D. happened to

Salt _______ in East and South China.

A. produce        B. is produce

C. is produced    D. produced

Singing the song will help you________ when you feel stressed out.

A. set up           B. cheer up

C. put up           D. think up

What ________ you do if you ______ me?

A. would; were      B. will; were      C. would; are       D. will; are