Don’t use your cellphone — we are flying at ____ altitude of 10,000 meters and ____average speech is 678km/h.
A.a(chǎn)n; theB.the; theC.the; anD.a(chǎn)n; an
A

試題分析:句意:不要使用手機(jī)—我們現(xiàn)在正在1000米的高空飛翔,平均速度是678km/h. altitude元音音素發(fā)音,表示海拔多高時用不定冠詞an,第二空用the表示特指飛機(jī)的速度,故選A
點(diǎn)評:冠詞是中學(xué)英語必須掌握的語言點(diǎn)。分為定冠詞、不定冠詞及零冠詞。定冠詞the表特指或是雙方都知道的人或物,不定冠詞a/an表泛指,以元音音素發(fā)音開頭的單數(shù)可數(shù)名詞要用an,這類題要特別注useful,European,university等詞中都是用a,零冠詞即不用冠詞的情況,多見于一些固定結(jié)構(gòu)中。
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