Question

________ the alien was in the museum, I called the TV station.

A．Because

B．Then

C．As soon as

D．While

Answer 1

D

连词辨析。Because因为；Then然后； As soon as 一……就；While 当……时候。句意：当外星人在博物馆的时候，我打电话给了电视台。故选Ｄ。
此题考查while引导的时间状语从句表示当…的时候。