题干
——Who's singing in the next room? Is it Lucy?
——It be her. She has gone to New York.
A：can't
B：must
C：shouldn't
D：can
答案(点此获取答案解析）
A
——Who's singing in the next room? Is it Lucy?
——It be her. She has gone to New York.
A：can't
B：must
C：shouldn't
D：can
sin4πtV，则：