Just as there are occupations that require college or even higher degrees, so too are there occupations ______technical training

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问题 Just as there are occupations that require college or even higher degrees, so too are there occupations ______technical training is necessary.

选项 A、for which
B、in which
C、to which
D、at which

答案A

解析 定语从句。be necessary for表示“对……来说是必要的”。介词for提前,先行词为occupations。故选A。
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