______we were worried about was ________they could manage to control the polluti
题型：不详难度：来源：
______we were worried about was ________they could manage to control the pollution.| A．That how | B．That whether | C．What that | D．What whether |
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答案
| D |
解析
| 本题考查名词性从句。What引导主语从句，从句中缺少宾语，whether引导表语从句，句意：我们所担心的是他们能否成功的控制污染。选D。 |
举一反三
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