The discovery was made in the 1950s, while the ________ of it was not recognized until half a century later.
A. sacrifice B. difference
C. significance D. insurance
Many of us would agree that improving the countryside through technology has great potentials ______ food development in China.
A. in terms of B. regardless of
C. in spite of D. on account of
It may not work out that one living in an English-speaking country will acquire the language ________.
A. effectively B. fluently
C. automatically D. severely
An ideal job should be one that _____ what you are good at with what you are interested in.
A. combines B. connects
C. contacts D. concentrates
Several underground stations are under construction at the same time these days, ________ the rush hour traffic even worse.
A. to make B. makes C. making D. made
According to Charles Keeling, the amount of carbon dioxide ________ sharply and steadily over the forty years between 1957 and 1997.
A. increased B. had increased
C. had been increased D. was increasing
