—How about ______ in the river with us
—Sorry, I can't. My parents often tell me ______ that.

单项选择题—I think English is ______ math. —Yes, I think so.

单项选择题—Wang Hong speaks English very well. — ______. She can talk with Americans freely.

单项选择题I hope we can fly to ______ moon one day.

单项选择题—I think science is more useful than art. —I disagree. I think art is ______ science.

单项选择题—Guess, how much does it cost —I think it costs ______ 15 and 20 dollars.