一、
1. we        2. he
3. Let us   4. can't
5. they're  6. their
7. no        8. Mike's sisiter's

二、
1. A
2. B
3. B
4. C
5. A

一、
1. we        2. he
3. Let us   4. can't
5. they're  6. their
7. no        8. Mike's sisiter's

二、
1. A
2. B
3. B
4. C
5. A