... d¹ng sè nhiÒu cña c¸c danh tõ sau: 1. this 2. she / he 3. a pencil case 4. a ruler 5. a marker 6. a boy 7. a cassette 8. a sneaker 9. a notebook 10. a table 11. a pen 12. a pencil 13. a book ... g.Hello,Ba. 8. who’s he? H.Bye bye.9. Hello,I’m Hoa. I. Nice to meet you ,too. 10.Goodbye, Nam K.He’s my brother. 11.This is my friend,Ba. L.Hi,My name’s Hong1’ 2 3’ 4’. 5’. 6’. 7’. 8 9’ 10’ ... tõ tr¸i nghÜa víi c¸c tõ sau:1. open 2. sit down3. tall 4. ugly5. old 6. thin 7. he 8. make a mess. 10. take out your book.11. raise your hand. 12. pick up your pen....