—Must we keep the window________ all the time? —No, you don’t have to.A. open B. opened C. Opening
—Can you work out this math problem? —Yes. ______
—Can I help you? —Yes. I want two ______ eggs.
My teacher promised to ______ my suggestions, so I gave him some ______ .
Mr. Wang is ______ his wife in social standing地位, because his wife has made more contributions to our society than he has.
—Have you read the poems ______ by Du Fu? —Of course, many of them.