This problem may lead to more serious ones if ________ unsolved.
| A．left | B．making | C．remained | D．keeping |
Soon after the quakes, one thousand soldiers were sent out to ______ the miners from the coal mine.
| A．command | B．rescue |
| C．bury | D．request |
His wife ________him to stop smoking, but he didn’t listen.
| A．advised | B．persuaded |
| C．suggested | D．frightened |
The maths teacher told the naughty boys _____ so much noise in class.
| A．not making | B．not to make |
| C．don’t make | D．didn’t make |
A number of books in the library ____ been stolen so that the number of them ____ smaller than before.
| A．has, are | B．has, is |
| C．have, is | D．have, are |
Many of them ignored his advice, _______ they knew it to be very useful.
| A．as if | B．because of |
| C．even though | D．so that |