—Yousee, I'm poor in maths; you are not good atEnglish, and. . . — That's __________ we should help each other.
It may not work out that one living in an English-speaking country will acquire the language ________.
An ideal job should be one that _____ what you are good at with what you are interested in.
Several underground stations are under construction at the same time these days, ________ the rush hour traffic even worse.
According to Charles Keeling, the amount of carbon dioxide ________ sharply and steadily over the forty years between 1957 and 1997.
When the news came that China’s football team ranked ________ 2nd and qualified itself for ________ 2nd round, we all jumped up with excitement.