题目内容
A foreign language like English is difficult to learn, so you ________ work too hard.
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Cultural life in England takes so many forms that a brief summary can only attempt to ________ its variety.
There are ________ periods in an animal’s life when it is capable of learning a great deal in a very short time.
Do employers in your country ________ workers for in juries suffered at their work?
Since they betrayed us, they have no hope of convincing ________ their sincerity.
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