________ the alien was in the museum, I called the TV station.
A．Because B．ThenC．As soon asD．While
D
連詞辨析。Because因?yàn)�；Then然后； As soon as 一……就；While 當(dāng)……時(shí)候。句意：當(dāng)外星人在博物館的時(shí)候，我打電話給了電視臺(tái)。故選Ｄ。
此題考查while引導(dǎo)的時(shí)間狀語從句表示當(dāng)…的時(shí)候。
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