2. 外语
  3. It is difficult for a (speak) ______ to speak loudly enough without a microphone.

It is difficult for a (speak) ______ to speak loudly enough without a microphone.

admin2013-09-03  42
问题 It is difficult for a (speak) ______ to speak loudly enough without a microphone.
选项
答案speaker
解析 for sb to do sth是动词不定式的复合结构，speak是动词，应该变成名词speaker。
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