Giải thích bài rõ ràng và vì sao

1.      a. peaceful                     b. disease                     c. shortage                   d. spacious

2.      a. commit                      b. healthy                     c. standard                   d. poverty

3.      a. malnutrition               b. population               c. overcrowded            d. accommodate

4.      a. criminal                     b. density                     c. nutrition                   d. megacity  

a. populated                 b. explosion                 c. economy                  d. diverse                        Tìm Trọng Âm , Giải Thích Rõ Ràng

Bài 5. Điền dạng đúng của động từ

1. If she ....................(study) hard, she .....................(pass) the exam.

2. If I ..................(come) soon, I ....................(call) you.

3. She ...................(feel) sad if you ....................(not, give) her a gift.

4. ......................... (Fred/be) angry if ......................... (Jack/arrive) late again.

5. No one .........................(know) the truth if you ................(not, reveal)

6. If the boy ....................(eat) that apple, he ....................(be) ill.

7. If  you .....................(not, hurry), you .....................(miss) the bus.

8. Tell him about this story if you .........................(see) him.

9. If you ..........................(have) a day off where        you..............(go)?\

10. If he ..................(cook) the meal himself, help him.

11. If......................(the weather/be) beautiful tomorrow, ...................... (we/drive) to the beach.

12. ......................... (I/buy) that machine if ......................... (it/not/cost) too much.

13.   Your father ...............(pick) you up if you ..................(come) back late?

14. What   you ..................(speak) if  you ....................(meet) a foreigner?

15. ......................... (they/win) this match, ......................... (they/be) the champions.

16. If ......................... (she/send) the letter now, ......................... (they/receive) it tomorrow.
17.........................(I/come) to your house if .........................I/have) enough time.
18. If ......................... (she/not/pass) this exam, ..........................(she/not/get) the job that she wants.
19. If .........................(I/get) a ticket, .........................(I/go) to the cinema.
20.........................I/go) to the doctor's if ......................... (I/not/feel) better tomorrow.

Bài 5. Điền dạng đúng của động từ

1. If she ....................(study) hard, she .....................(pass) the exam.

2. If I ..................(come) soon, I ....................(call) you.

3. She ...................(feel) sad if you ....................(not, give) her a gift.

4. ......................... (Fred/be) angry if ......................... (Jack/arrive) late again.

5. No one .........................(know) the truth if you ................(not, reveal)

Khuyến khích

6. If the boy ....................(eat) that apple, he ....................(be) ill.

7. If  you .....................(not, hurry), you .....................(miss) the bus.

8. Tell him about this story if you .........................(see) him.

9. If you ..........................(have) a day off where        you..............(go)?\

10. If he ..................(cook) the meal himself, help him.

11. If......................(the weather/be) beautiful tomorrow, ...................... (we/drive) to the beach.

12. ......................... (I/buy) that machine if ......................... (it/not/cost) too much.

13.   Your father ...............(pick) you up if you ..................(come) back late?

14. What   you ..................(speak) if  you ....................(meet) a foreigner?

15. ......................... (they/win) this match, ......................... (they/be) the champions.

16. If ......................... (she/send) the letter now, ......................... (they/receive) it tomorrow.
17.........................(I/come) to your house if .........................I/have) enough time.
18. If ......................... (she/not/pass) this exam, ..........................(she/not/get) the job that she wants.
19. If .........................(I/get) a ticket, .........................(I/go) to the cinema.
20.........................I/go) to the doctor's if ......................... (I/not/feel) better tomorrow.

Bài 7. Cho hai đa thức: P(x) = 5x- 3x+7-x và Q(x) =-5x +2x-3+2x-x-2
                                      b) Tim đa thúc M(x) = P(x) + Q(x). a) Thu gọn hai đa thức P(x) và Q(x)
c) Tim x để P(x)=-Q(x)

Bài 4   Cho hai đa thức:         P(x) =  8x⁵ + 7x - 6x² - 3x⁵ + 2x² + 1

                                                 Q(x) =  4x⁵ + 3x - 2x² + x⁵ - 2x² + 8

                        a/ Thu gọn và sắp xếp hai đa thức trên theo lũy thừa giảm dần của biến ?

                  b/Tính P(x) + Q(x)                  c/ Tìm x để P(x) =Q(x) ?