Although everything seems to have been taken into consideration, ____  accident can happen when the astronauts walk in  _____  space．
A．不填；theB．a(chǎn)n；不填C．the；theD．a(chǎn)n；the
B

試題分析：第一空表泛指，并沒(méi)強(qiáng)調(diào)是哪起事故，故用不定冠詞an，in space 在太空上，為固定短語(yǔ)。句意：盡管一切事情都已考慮，但宇航員在太空行走時(shí)還是有可能發(fā)生事故。
點(diǎn)評(píng)：解答有關(guān)冠詞的題型，可以從兩方面入手，一是習(xí)慣搭配，二是固定短語(yǔ)。對(duì)于固定短語(yǔ)平 時(shí)應(yīng)多讀多記。
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