2. 外语
  3. The energy gained from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his bod

The energy gained from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his bod

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问题 The energy gained from the sun can then be used during the night to enable the necessary chemical reactions to ______ in his body.
选项 A、precede
B、proceed
C、progress
D、practice
答案B
解析 precede：领先(于)，在……之前，先于；proceed：进行，继续下去，发生；progress：前进，进步，发展； practice：实行，实践，实际，惯例，习惯，实习，开业。此句指的是白天从太阳那获得的能量在夜晚被用在体内进行化学反应，所以答案是B。其他选项不符合题意。
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