I insisted that the boy his hands before having supper.
| A．washes | B．washed | C．had washed | D．(should) wash |
____in faraway northwest , this place has its beautiful fresh air .
| A．Being located | B．Located | C．locating | D．To be located |
I realize she can be very troublesome, but ______I think you should apologize for being so angry with her.
| A．all the same | B．once in a while | C．in actual fact | D．all the time |
There is a new problem ____in the popularity of private cars ____ road conditions need to be improved .
| A．involving ; that | B．involved ; that |
| C．involved; where | D．involving ; which |
It doesn’t matter to me _____I miss my train, because there’s another one later.
| A．that | B．if | C．unless | D．when |
___we admit that there are still some problems about NMET, we don't mean that it is of no use.
| A．Until | B．While | C．As | D．Unless |