Chọn đáp án đúng và giải thích

23. you have to obey the traffic........when you are in street 
a jam                b rules                    c light                         d hours
24 Blck cat is the............. of bad luck 
a symbol           b brand             c picture                         d animal
25 You..............cross the street when the light is red
a should             b don't have to                   c can                 d mustn't
sửa lỗi sai 
26 Hoa collected stamps when she is 6 years old
27 However is rained , the played soccer after school 
28 How far dose it from your house to the shopping mall