If you have trouble pronouncing the word, you can repeat it over and over again _______ you are comfortable with it.

A．unless B．if
C．until D．while

C

解析試題分析：句意：如果你在這個(gè)單詞的發(fā)音上有問題，你可以一遍又一遍的重復(fù)知道你讀順為止。A. unless“除非”；B. if“如果”；C. until“直到…”；D. while“當(dāng)…時(shí)候”。結(jié)合句意，故選C。
考點(diǎn)：考查連詞的辨析。

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