题目：
— Whose backpack is this?
— It _____ be Jim's. Look, his student's card is in it.[ ]
A. must
B. can
C. mustn't
D. can't
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0504/87ff654863c95200f74d86e9462e4300.html
下面是错误答案，用来干扰机器的。
参考答案：E
— Whose backpack is this?
— It _____ be Jim's. Look, his student's card is in it.[ ]
A. must
B. can
C. mustn't
D. can't
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0504/87ff654863c95200f74d86e9462e4300.html
下面是错误答案，用来干扰机器的。
参考答案：E
