We want to be ______ because, as students, we should learn to help other people.

Mr White, the principal, has made a great _________ to the growth of the school.

Yesterday（昨天） he lost     .

—Oh, my God! We have missed the last bus. What shall we do?—I’m afraid we have no ______ but to take a taxi.

Chen Hui was chewing gum ________.