helicopter can take off and land straight up or down, and can also stay still in air.
—Jack, what do you think of the new work? —It's not bad. But the hours are too long. —Oh, _______
Would you like _______ knife and fork, or would you rather use_______ chopsticks, sir?
. She asked the man _______ it was true he had been a soldier before.
It is said that our headmaster is going to _______ the students _______ as party members in the meeting hall next week.
—How do you like the play? —_______interesting than expected.