In the future, care for the environment will become very important as earth's natural resources _____.
| A．run out | B．use up |
| C．run out of | D．use out |
She felt sorry that she had disturbed the ____ calmness of a man she respected.
| A．regular | B．curious | C．usual | D．various |
We are going to discuss the way of reading works ____ it is used for real life purposes, and this should give you a better understanding of it.
| A．that | B．which | C．where | D．when |
His letter was especially welcome as I ____ from him for long.
| A．haven’t heard | B．would not heard |
| C．hadn’t heard | D．didn’t heard |
Scientists say they have found a way to produce the human body’s own cancer-killing cells through gene treatment, ____ new hope to cancer sufferers.
| A．offering | B．showing | C．taking | D．making |
To get as much firsthand information as possible, inspectors will hold workshops and distribute questionnaires, ____?
| A．isn’t it | B．won’t it | C．aren’t they | D．won’t they |