【題目】Look! There are two planes _____in the sky.

A. fly B. flying C. to fly D. are flying

【答案】B

【解析】

句意：看！有兩架飛機在空中飛行�？疾楣潭ň涫�。根據(jù)Look! There are two planes ___in the sky.可知，本題考查固定句式：There be+主語+doing+介詞，表示在某處有某物正在做某事。結合選項可知B選項符合題意，故答案選B。

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