题干
—Have you seen Jack? His mother is looking for him all the afternoon.
—No, I haven't. I am sure mother be very worried.
—No, I haven't. I am sure mother be very worried.
A：must
B：may
C：need
D：should
答案(点此获取答案解析）
A
，出差返回时发现家中有一盏60W台灯亮着，检查其他电器都已切断电源，再查看电能表的示数为
，则小张出差时间长达（ ）
