— Why are your hands that dirty?
— Oh, I______ in the garden since we finished breakfast.
| A．worked | B．was working |
| C．am working | D．have been working |
In the face of ________ failure, it is the most important to keep up ________ good state of mind.
| A．/; a | B．a; / | C．the; / | D．/; the |
Sheep on a remote Scottish island are gradually shrinking _______ global warming, according to a study published in the journal Science.
| A．on account of | B．by means of | C．in case of | D．in spite of |
The long absence of rain _______ leads to a serious drought in the southwest of China, which draws the concerns of the whole country.
| A．immediately | B．accidentally | C．gradually | D．undoubtedly |
．Over 800 pages of the earliest surviving Christian Bible have been recovered and made _______ on the Internet.
| A．flexible | B．brilliant | C．conventional | D．available |
She was _______whether to follow her husband to go abroad or to stay at home to look after her parents.
| A．taken between | B．taken up | C．taken off | D．taken away |