—What has ________ done since 1989?. —It has built many schools for poor children .

The underlined part in the sentence “She has many good books.” is a/an________. 

— What do you think of the human and the computer?—A human ____can do some things better than a computer, for example, creating new ideas.

The headmaster turned a deaf ear to the _____ of the parents.

---Have you heard the good _______?---Yes! The radio says China will send an explorer(探险家）to Mars.