题目内容
【题目】The smoke was so thick that I was having trouble ______.
A. to breathe B. in breath C. with breathing D. breathing
【答案】D
【解析】试题分析：句意：烟太大了，我呼吸有困难。Have trouble doing sth（做某事有困难）。故选D。
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【题目】The smoke was so thick that I was having trouble ______.
A. to breathe B. in breath C. with breathing D. breathing
【答案】D
【解析】试题分析：句意：烟太大了，我呼吸有困难。Have trouble doing sth（做某事有困难）。故选D。