题干
— 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
答案(点此获取答案解析）
B
— 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
