Question

【题目】— Who is singing in the next room?
— It be Lucy. She likes singing at this time.
A.can
B.must
C.mustn't
D.should

Answer 1

【答案】B
【解析】句意：——谁在隔壁房间唱歌？——一定是Lucy，她喜欢在这个时间唱歌。can表猜测时用于否定句和疑问句中。must表示肯定的猜测，“一定，肯定”；mustn't表禁止，“千万不要，必须不”；should应该。根据说话的语气可知选B。