I.tìm và sữa lỗi: 1.I'd like sending these postcards to america 2. she is quite different with her mother. 3. he isn't enough strong to carry this suitcase. 4. we have knew each other since we were children. 5. shopping in the mall is more comfort. 6. I've been waiting for him since two hours. 7. they haven't saw her since last week