【题目】—I went to see you at about ten this morning, but you were not in the office.
—Oh, that was probably _______ I was talking with the headmaster.
A.whenB.whyC.whatD.that
在线课程【答案】A
【解析】
考查连词。句意：——今天上午十点左右我去看你，但你不在办公室。——哦，那可能是我和校长谈话的时候。分析语境可知，回答强调的是时间，那段时间我在与校长谈话，所以我不在；用when正合适。故选A项。