问题：
【题文】 —What has made him look like lacking sleep?
—_______ his wife is ill and he has to get up several times a night to attend to her.
A．For
B．Because
C．That
D．What
【题文】 —What has made him look like lacking sleep?
—_______ his wife is ill and he has to get up several times a night to attend to her.
—_______ his wife is ill and he has to get up several times a night to attend to her.
| A．For | B．Because | C．That | D．What |
参考答案：