THIS IS A VALUABLE BOOK. YOU MUST LOOK AFTER IT CAREFULLY AND YOU...

31. - KIEM TRA HOC KI 2 ANH VAN 12 6 KIEM TRA 12 HK2
Lớp 12 KIEM TRA HOC KI 2 ANH VAN 12 6 KIEM TRA 12 HK2
31. This is a valuable book. You must look after it carefully and you needn’t lose it. A. a B. carefully C. needn’t D. must look