應(yīng)該是選C吧
首先排除D
A通常不這樣用 而用I was leaving when the telephone rang.
B be to 表示計(jì)劃、打算做某事或者是命中注定做某事.一般表示將來(lái)的某些計(jì)劃,后面可以加上時(shí)間限制的狀語(yǔ),如next week,next Friday等
C was about to 多指馬上要做某事,即將做某事,不能與表示明確時(shí)間的短語(yǔ)搭配
was about to……when……是個(gè)固定搭配,這里when是個(gè)并列連詞,可以理解為at that time
關(guān)于這題我的理解為,就在我要出門的那個(gè)時(shí)間點(diǎn)上,電話響了.我覺(jué)得我馬上要出門這里的語(yǔ)境最符合,C恰好表示即將,馬上的意思.
I was about to leave and at that time the telephone rang.