I’m sorry but my time is ______; I can only give you a few minutes.
| A．rare | B．flexible | C．precious | D．appropriate |
With the widespread of fog and haze(雾霾) in central and eastern China, our government is supposed to ______ their efforts to prevent further pollution.
| A．make up | B．show up |
| C．step up | D．wake up |
The Yeti is said to be a large, hairy animal walking _____two feet like a human being and moving _____ amazing speed and strength.
| A．with; at | B．by; at |
| C．on; with | D．on; at |
— Could you meet me at the airport?
— I'd like to，but I'm afraid I ______ a very important meeting when you return.
| A．am attending | B．was attending |
| C．will be attending | D．will have attended |
The science of computer, ______ rapid progress has been made in recent years，plays a very important role in our daily life.
| A．from which | B．for which |
| C．with which | D．to which |
—John is said to have _____ missing since last week. Has he gone somewhere?
— Not really. He_______ his newly-bought apartment.
| A．gone, has decorated | B．been, was decorating |
| C．done, decorated | D．been, has been decorating |