题目

The plane flew smoothly ______ in the sky and people spoke ______ of the experienced pilot. A. high；high      B. highly；highly C. high；highly   D. highly；high 答案：C 解析: C high in the sky 是个形容词短语，意为“高高地在天上”。同时，speak highly of 是个词组，表示“高度赞扬”的意思

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