I drove to Zhuhai for the air show last week.—Is that__________you had a few days off?

The key _____ four modernizations lies _____ the science and education

To our surprise, our monitor picked the ______ apples of the four this morning.

Do you mind my taking the books away— ________.

Most Brazilians get along well with each other， _________ they are from different races(种族)， including Americans， European settlers， and Africans，.