Ladies and gentlemen, please fasten your seat belts. The plane __________.
| A．takes off | B．is taking off | C．has taken off | D．took off |
As is often said, a friend is to man_____ water is to fish.
| A．what | B．as | C．that | D．which |
To his disappointment, the opinion he had held____ out wrong.
| A．turned | B． turning | C．has been turned | D．has turned |
—My son has got a straight A in all his final exams.
— What a ____ boy! Congratulations!
| A．promising | B．predictable | C．eager | D．curious |
We should try all means to ensure ourselves_____ all possible risks.
| A．that | B．against | C．for | D．to |
Can you tell me_____ difficult the exam turns out to be?
| A．what | B．how | C．that | D．\ |