Nowadays, scientists are working hard to find a best way of treating addictions __________ drugs.
| A．of | B．in | C．on | D．to |
.
He made a big mistake, and _________, he lost his job.
| A．as a result | B．as soon as | C．in case | D．even if |
.
The forest guards often find campfires that have not been _________ completely.
| A．put away | B．put out | C．put up | D．put off |
.
My mother ______ live in the country by herself, but now she got used to ______ together with us in the city.
| A．used to; live | B．got used to; living | C．used to; living | D．was used to; live |
.
Going on a trip to a far-away destination _________ be expensive and difficult, but it is very interesting.
| A．can | B．must | C．should | D．will |
.
We are _________ that she should be admitted into our club.
| A．likely | B．mental | C．anxious | D．willing |