many --> much 

Vì homework là danh từ không đếm được

How much + danh từ không đếm được

How many homework does she have every day ?

Homework thiếu "s"

vì đi chung với "many" (many tức là chỉ số nhiều)

im listening to music

cho mình đúng đi 

Studying math is more difficult than studying English.

Learning online is more ffective than learning at school.

History is the most interesting subject.

Studying hard is the best way to get high marks.

Jennie's grades are higher than her sister's. (Điểm của Jennie cao hơn chị gái của cô ấy)

He speaks Korean more fluently than his friend( Anh ấy nói tiếng Hàn trôi chảy hơn bạn của anh ấy)

The most boring thing about English course is doing grammar exercises. (Điều nhàm chán nhất của khóa học tiếng anh là làm các bài tập ngữ pháp)

Linda is the most intelligent student in my class. (Linda là học sinh thông mih nhất lớp của tôi)

1. Skiing is more difficult than skating.

2. Maths is easier than Vietnamese.

3. Skiing is not as dangerous as snowboarding.

C1,
1, Skiing is not as easy as skating
2, Maths is not as difficult as Vietnamese
3, Skiing is not as dangerous as snowboarding

C2,
1, Skiing is more difficult than skating
2, Maths is easier than Vietnamese
3, Skiing is safer than snowboarding
* Bạn có thể chọn 1/2 cách nhé*

Chào em, em tham khảo nhé:

1. Either Tom or Martin sent that email.

2. Both Nigel and Anthony bought some CDs.

Chúc em học tốt.

1 Tom's room is the cleanest of all

2 Of all Polish writers, Scienkiewicz is the greatest one

3 Egypt is one of the oldest countries in the world

4 In the world, Canada is the second largest country

5 Winter is the worst time for us

6 It is the ugliest town I know

7 This is the widest road in the country

8 What is the smallest animal in the world?

9 Is the elephant whale the biggest animal in the world?

10 I am the worst student in the class

6 D

7 B