C, C
4. b (mik ko chắc lắm)
5. c
II.
1. was
2. was
3. was- did- was
4. Did- were- was-was
a) 53= 125
b) 35: 92
= 35: (32)2
= 35: 34
=3
Năm nay bạn bao nhiêu tuổi?
bn phải chụp cả Ex 1 chứ