单选题：The IES offers its services without charge to companies it

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题目内容：

The IES offers its services without charge to companies it A．has already invested i
B．has previously provided directors fo
C．believes have a good chance of recover

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A recently appointed Purchasing Officer needs to learn what

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根据材料，请在（7）处填上最佳答案。

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第(22)处填写：

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Successful language learning is active, so successful learne

Successful language learning is active, so successful learners_____.A) wait for

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