【题目】He went to the hospital for a medical examination. And that is ______ he was absent from the meeting.
A.why
B.because
C.whether
D.what

【答案】A
【解析】句意：他去医院体检了，那就是他缺席会议的原因。that is why后面跟的是结果，表示“那就是……的原因”。that is because后面跟的是原因，表示“那是因为”。选A。