thành ngữ tiếng anh nha bn

1.D 2.A 3.C 4.D 5.B 6.A 7.B 8.C 9.B 10.B 11.D 12.B 13.C 14.B 15.A 16.D 17.D 18.C 19.A 20.B 21.A 22.A 23.C 24.C 25.B 26.C 27.A 28.D 29.D 30.A 31.A 32.C 33.A 34.B 35.D 36.D 37.A 38.D 39.D 40.A

sai r bn ơi

(lưu ý * là mũ 2 nha)

x*-2013x-2014=0

<=> x*- 2014x+x-2014=0

<=>(x*+x)-(2014x+2014)=0

<=>x(x+1)-2014(x+1)=0

<=>(x+1)(x-2014)=0

<=> +) x+1=0           <=> +) x= -1

       +) x-2014=0              +) x=2014

vậy S= {-1;2014}

Mary asked Phuong if Ha Long Bay was in the northern of Viet Nam

(* là mũ 3, ^ là mũ 2 nhé)

x*- 5x^ + 6x=0

<=>x* - 3x^ - 2x^ + 6x=0

<=>(x*- 2x^)-(3x^+ 6x)=0

<=>x^(x-2)-3x(x-2)=0

<=>(x-2)(x^-3x) =0

<=>(x-2)x(x-3)=0

<=> _x-2=0            <=> _x=2

       | x=0                      | x=0

        _x-3=0                  _x=3

vậy S= {2;0;3}

trình bày hơi phức tạp thông cảm =)))))

all of them had known that the way to success had not been easy

A.(nhưng H2 là khí nhẹ nhất mà??)

11.A 12.D 13.B 14.C 15.D 16.A

25. last week my class had a remember day

26.On the weekend we decided to visit Con Son Pagoda

27.when we came there, it started to rain heavily

28.we had had to wait for 5 hours before the rain stopped(ko bị lặp đâu mik dùng QKHT đó)

29.everyone was very hungry, so we had lunch

30. After lunch, we began to visit the pagoda

31.unfortunately, it began to rain heavily again

32. when the rain stopped, it was 5pm

33. everybody got really wet and cold