1 D => doesn't (ở vế đầu dùng động từ thường nên sau but cũng phải dùng động từ nhưng phủ định nên dùng trợ động từ)

2 D => at (arrived at + địa điểm cụ thể)

3 A => to playing (in addition to + Ving)

4 C => the piano (chơi nhạc cụ thì dùng the phía trc nhạc cụ đó)

5 A => careless-prepared (dịch nghĩa)

are=>is

having leisure time là cn số ít

\(c,x\left(\dfrac{1}{5}+\dfrac{1}{4}\right)-\left(\dfrac{1}{7}+\dfrac{1}{8}\right)=0\\ \Leftrightarrow\dfrac{9}{20}x-\dfrac{15}{56}=0\\ \Leftrightarrow x=\dfrac{15}{56}\cdot\dfrac{20}{9}=\dfrac{25}{42}\)

\(d,\left(2x-\dfrac{2}{3}\right)\left(x+0,5\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}2x=\dfrac{2}{3}\\x=-\dfrac{1}{2}\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{3}\\x=-\dfrac{1}{2}\end{matrix}\right.\)

\(4,\)

\(\left(-111\right):\left(-\dfrac{1}{11}\right)=1221\)

d: Ta có: \(\left(2x-\dfrac{2}{3}\right)\left(x+\dfrac{1}{2}\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}2x=\dfrac{2}{3}\\x=-\dfrac{1}{2}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{1}{3}\\x=-\dfrac{1}{2}\end{matrix}\right.\)

c. \(x\left(\dfrac{1}{5}+\dfrac{1}{4}\right)-\left(\dfrac{1}{7}+\dfrac{1}{8}\right)=0\)

<=> \(x\left(\dfrac{1}{5}+\dfrac{1}{4}\right)=\dfrac{1}{7}+\dfrac{1}{8}\)

<=> \(x.\dfrac{9}{20}=\dfrac{15}{56}\)

<=> x = \(\dfrac{15}{56}:\dfrac{9}{20}\)

<=> x = \(\dfrac{25}{42}\)

1. In spite of getting up early, he was late for the first train (Cấu trúc In spite of +V-ing)

2. Despite being an excellent doctor, he can’t cure lever cancer. (cấu trúc despite+ving)

3. How far is it from Vinh to HN?

4. I used to walk to school when I was small (cấu trúc used to+ to V)

1 wash (made sb Vo)

2 cleaned (had st + V3)

3 cashed(had st + V3)

4 to go (ask sb to V)

5 stay (made sb Vo)

6 painted (had st + V3)

7 to write (told sb to V)

8 shortened (had st + V3)

9 redo (made sb Vo)

10 filled (had st + V3)

wash

cleaned

cashed

to go

stay

painted

to write

shrtened

redo

filled

1 wash 

2 cleaned 

3 cashed

4 to go 

5 stay 

6 painted 

7 to write 

8 shortened 

9 redo 

10 filled 

1 B

2 A

3 C

4 B

5 C

6 D

7 B

8 C

9 C

30 A

Lỗi

Thứ tự sắp xếp các cụm từ: \(\left(1\right);\left(3\right);\left(2\right);\left(4\right)\)

Ta có ^A=^D;^A=^B⇒^B=^D(tính chất bắc cầu)

Mà ^B=^D là 2 góc so le trong⇒AD//BC

Bài 1:

a) \(\dfrac{7}{8}>\dfrac{11}{13}\)

b) \(\dfrac{2010}{2011}< \dfrac{2011}{2012}\)

c) \(-\dfrac{17}{16}< -\dfrac{2}{3}\)

d) \(-\dfrac{2010}{2011}< \dfrac{2011}{-2000}\)

e: \(\dfrac{a}{m}< \dfrac{a+b}{2m}< \dfrac{b}{m}\)

?