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Kim loại đen: thành phần chủ yếu là Fe và C: gang, thép. Kim loại màu: hầu hêt các kim loại còn lại: đồng, nhôm,... So với gang, thép thì đồng, nhôm kém cứng hơn, dẻo hơn, dễ biến dạng hơn, "nhẹ" hơn, không giòn như gang,...

Tích đã cho các thừa số âm là số  dương nên tích có dấu "+"

Tích đã cho các thừa số âm là số âm nên tích có dấu "-"

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1. Welcome ( to / at / in / for ) ___________ Pleiku city !

2. Tree leaves ( are used / is used / used / using ) ________ to wrap things.

3. I am delighted ( that / to / in order to / so that )_________ you passed your exam.

4. They ( have studied / has studied / studied / are studying )__________English for 10 years.

5. This building ( was build / were built / was built / built ) ______________ 5 years ago.

6. I am very pleased ( when / that / for / how )__________ my students are very intelligent.

7. a. bag b. sandal c. waste d. matter

8. a. reuse b. reduce c. recycle d. rain => Trọng âm

10. My father ( buy / to buy / bought / buys )________ a new TV Yesterday.

11. I ( haven’t seen / don’t see / hasn’t seen / didn’t see ) ___________ my old friends for 3 years.

12. 23. I used to ( live/ lives / living / lived)___________ on a farm when I was a young boy.

13. Yesterday My father ( buy / to buy / bought / buys )________ a new TV.

14. The Lost Shoe is ( an old folktale / a play / a modern story / a drama )___________

15. Lan likes ( singing / sings / sang / to sang )__________ an English song.

16. Traditional stories are always ( bored / great / tired / slowly )___________.

17. I will see you ( on / in / at / between )________ Sunday.

18. When I was a young boy, I used to get up ( on / in / between / at ) ______ 5 o’clock in the morning.

19. Minh’s father was born (on / in / between / at ) _______ 1955.

20. I went to bed ( late / lately / latest / later ) _______ last night.

Ư(6 ) : {1 ; 2 }

B ( 6 ) : { 6 ; 12 }

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