10．We watched，amazed as firebroke out（爆發(fā)） on the outside of the spaceship．

分析 我們看著，驚訝于宇宙飛船爆發(fā)的火．

解答 broke out 考查固定短語．根據(jù)句意：我們看著，驚訝于宇宙飛船爆發(fā)的火．break  out是英語的固定搭配"爆發(fā)"，本句是用的是過去時，所以答案填broke out．

點評 英語中的固定短語，既不能添詞，也不能少詞，是固定的，要求同學(xué)們在平時記憶準確，然后根據(jù)句意找出記憶中的固定搭配，做出正確的答案．

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