问题
                    
Jack ______ be in the library. He is playing football on the playground.
                            A:can’t
B:can
C:need
D:must not学科
                        
                        B:can
C:need
D:must not学科
正确答案是:
                        
                        
                        
                    同类题型
                    _______ people lost their homes in Japan’s earthquake.
Li Lei often takes care of the old woman after school.
No one wants you to be _______ but we really want you to do your best always.
There are a few books on the shelf. But only one of them is________.
I found a story-book on the desk, it isn’t mine, it is ___,I think.