____________ the weather has improved, the game will be held as planned.
A.While | B.Since | C.If | D.Unless |
Penicillin became the greatest drug of the 20th century, without ______ many people ______ from sickness or even small wounds.
A.it, died | B.which, have died |
C.which, would have died | D.it, would have died |
Hot water is converted to electricity by a turbine. The underlined word can be replaced by ______.
A. conveyed B controlled. C. chosen D. Changed
The noise coming from upstairs are driving me mad.
A.cognitive | B.excessive |
C.irritating | D.Exposing |
We should take effective measures to the infectious disease.
A.work out | B.stamp out | C.turn out | D.carry out |
Since Tom downloaded a virus into his computer, he cannot open the file now.
A.constantly | B.accidentally |
C.deadly | D.Eventually |