You and I could hardly work together，________？
| A．could you | B．couldnt' I |
| C．couldn't we | D．could we |
One learns a language by making mistakes and _______ them.
| A． correct | B．correcting | C．corrects | D．to correct |
_____such heavy pollution already, it may now be too late to clean up the river.
| A． Having suffered | B．Suffering | C．To suffer | D．Suffered |
—Will you stay for lunch?
—Sorry, ____________. My brother is coming to see me.
| A． I mustn’t | B．I can’t | C．I needn’t | D．I won’t |
—Are you coming to Jeff’s party?
—I’m not sure. I__________ go to the concert instead.
| A． must | B．would | C．should | D．might |
We needed a new cupboard for the kitchen. So Peter made____________from some wood we had.
| A． it | B． one | C． himself | D． another |