Question

【题目】Helen was about to walk out of the door________ the telephone rang.

A.whenB.thenC.whileD.that

Answer 1

【答案】A

【解析】

考查固定句式。句意：海伦正要出门，这时突然电话铃响了。be about to do when…是固定句式，表示“正要……这时（突然）某事发生”，故A项正确。