同学你好，该知识点来自沪江网校《英语零基础直达大学六级【随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
1 T： Is he a doctor or a dentist?
S： He can't be a doctor. He must be a dentist.
2 T： Is she Danish or Norwegian?
S： She can't be Danish. She must be Norwegian.
3T： Are they listening to the stereo or watching television?
S： They can't be listening to the stereo. They must be watching television.
4 T： Is it the 1st or the 2nd today?  少了一个the
S： It can't be the 1st. It must be the 2nd.
5 T： Are they Austrian or German?
S： They can't be Austrian. They must be German.
6 T： Is she 32 or 30?
S： She can't be 32. She must be 30. 7 T： Is it cheap or expensive?
S： It can't be cheap. It must be expensive.
8 T： Is he shaving or having a bath?
S： He can't be shaving. He must be having a bath.
9 T： Is he the oldest or the youngest in the family?  这里注意是He
S： He can't be the oldest. He must be the youngest.
10 T： Are they mechanics or engineers?
S： They can't be mechanics. They must be engineers.

所有的答案助教都会看哦，只有有错误的会指出来，不是仅仅看了两个哦O(∩_∩)O~

祝同学学习进步~