－Dirty water shouldn’t be poured intorivers.－_______. It will cause pollution.

The famous singer made a promise to the public that he would ________ half of the year’s income to help the disabled.

”is regarded as a time in their life fun,passion, and imagination seem limitless.

Did you watch the program Voice of China on Friday night It was wonderful.—I wish I had, but I ________ for the mid-term examination then.

She looks very happy. She __________ have passed the exam.— I guess so. It’s not difficult after all.