问题
Look! A book is on the floor. Whose is it?—It ______ be Rick’s. It has his name on it.
A:mustn’t
B:can’t
C:must
D:need
B:can’t
C:must
D:need
正确答案是：
同类题型
I won’t leave my office until my work.
Lucy is our new student. Let’s _____ her.
How do you like working here?—_______.To be honest，I miss my former colleagues．
The new machine is supposed to be the solution to all our production problems, but”____”.
Becky is ________telling stories. So he wants to join the story telling club.