______ it have been the failure to pick up directions from the ground control that caused the air crash?
| A．Must | B．Could | C．Would | D．Should |
I’m just wondering ______ I first met Tom.
| A．where it was that | B．that it was where |
| C．where was it that | D．that was it where |
— Would you like Alice or Jane to do the task?
—_______ is up to it. I’m sure they have the ability.
| A．None | B．Both | C．Neither | D．Either |
—I’m afraid I can’t memorize so many new words in 2 days．
—_______．
| A．Don’t be afraid | B．You are clever | C．Not at all | D．Take your time |
So difficult______it to live in an English-speaking country that I determined to learn English well.
| A．I have felt | B．Have I felt | C．I did feel | D．did I feel |
The new law has come into _____; surely it will have _____on industry of the country.
| A．affect; an effect | B．effect; affect |
| C．effect; an effect | D．an effect; an effect |