----She must have gone back to the valley.
----No, she _____. The entrance to it was nowhere to be found.
A mustn’t B needn’t C couldn’t D hadn’t
The head of the company promised to deal with matters of this sort ____ he returned to his office.
| A．the moment | B．while |
| C．by the time | D．until |
He will have learnt English for eight years by the time he _____ from the university next year.
| A．will graduate | B．graduates |
| C．will have graduated | D．is to graduate |
The airline said the two flights to Shanghai were stopped ______ passengers.
| A．for lack of | B．in need of |
| C．in favor of | D．with the help of |
Since then, finding ways ______ more peanuts has been his life goal.
| A．to growing | B．of being grown |
| C．with growing | D．to grow |
He said life wouldn’t be worth ______ without friendship.
| A．being lived | B．to be lived |
| C．living | D．to be living |