填空题

But for his help, we couldn’t have solved the problem.

【参考答案】

要不是他帮忙

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问答题

21世纪是网络的时代。 2．网络生活丰富多彩。 3．网络生活只是我们生活的一部分。

填空题

As a result of sufficient preparation, the heart operation was performed successfully.