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1. playing -> play
2. used -> use
3. did -> do ; do -> did
4. go -> went
5. is -> was
6. at -> in
7. often rains -> does it rain
8. it's -> it (có vài lỗi sai chính tả ở phần sau như "Santa clouse và Chritmas")
10. is -> are
1. playing -> play
2. used -> use
3. do you do -> did you do
4. go -> went
5. is -> was
6. childs -> children
7. at -> in
8. takes -> take
9. is -> bỏ
1. is flying
2. doesn't often write
3. does...have
4. are...skipping
5. is sleeping
6. doesn't have
7. are you doing
8. goes
1. is flying
2. doesn't often write
3. does ... have
4. is skipping
5. is sleeping
6. doesn't have
7. are you doing
8. goes
5x+6⋮x+2
=>5(x+2)-4⋮x+2
Mà x+2⋮x+2 =>5(x+2)⋮x+2
=>4⋮x+2
=>x+2∈Ư(4)={-4;-2;-1;1;2;4}
=>x∈{-6;-4;-3;-1;0;2}
Vì x+2 ⋮ x+2; 5 ∈ N
=> 5(x+2) ⋮ x+2
=> 5x +10 ⋮ x+2
Mà 5x + 6 ⋮ x+2
=> (5x+10)-(5x+6) ⋮ x+2
=> 4 ⋮ x+2
=> x+2 thuộc tập ước của 4
Mà ước của 4 = {1;-1;2;-2;4;-4}
=> x+2 ∈ {1;-1;2;-2;4;-4}
=> x ∈ {-1;-3;0;-4;2;-6}
Vậy x ∈ {-1;-3;0;-4;2;-6}
1. we don't stay up late at night
2. my sister goes on a trip every year
3. 2 km isn't too far to jog
4. nam speaks english very well
Các số lẻ trong khoảng từ 2000 đến 2020 đều là hợp số bởi vì những số đó có nhiều hơn hai ước
1 My brother (sleep) often sleeps on the floor . (often)
2 (stay) Does he sometimes stay up late? (sometimes)
3 I(do) always do the housework with my brother . (always)
4 Peter and Mary (come) never come to class on time (never)
5 Why (get) does Johnson always get good marks ?. (always)
6 (go) Do you usually go shopping? . (usually)
7 She( cry ) (seldom) seldom cries
8 My father (have) never has popcorn .( never ).