1.Vì sao người cao huyết áp thường dẫn đến tai biến mạch máu não?/50
2.Tại sao tiêm thuốc chữa bệnh lại tiêm tĩnh mạch,tiêm vacxin lại tiêm cơ bắp?/51
3.vì sao khi đỉa hút máu thì chỗ vết hút lâu đông?/36
 

1.Giải thích vì sao trong dạ dày có HCl mà không ảnh hưởng đến dạ dày?
2.Giải thích:Khi nghỉ ngơi,vận động viên thể thao có nhip tim thấp hơn người bình thường nhưng lưu lượng tim thì vẫn giống người bình thường.

1.I'll lend you the book when I've finished (read).......... it
2.She loves (watch)........... TV
3.Mai is interested in (play)........... chess
4.Would you like (go)........... out for a drink with me?
5.I need (post)........... a parcel to Da Nang

1.My sister is young.She can't drive a car
➞.......................................................................................................
2.Ba is strong.He can carry the heavy box
➞.......................................................................................................

Prepositions:
1.Children are fond........picture books
2.My sister is good.........Maths and English
3.My hair is as long......... her hair
4.Tom is different.......... his parents
5.Are you interested.......... that topic?
6.It's very kind........... you to say so
7.Mary was born............ December 25
8.Where is Nam?-He is............ the cinema
9.What subjects do you have............ Monday?
10.They have to go home............ 6 o'clock because there is the 6 o'clock news
11.Please come here........... 7 a.m and 8 a.m
12.Dogs often bark.......... night
13.What do you often do.......... the summer?

1.The last time saw him was in 1986
➩I haven't................

2.They plan to raise funds for handicapped children
➩They are going to..............

1.The residents in my..........are very friendly

2.This house is.............from that one

3.They...........in this factory since last year

4.My Dad told me...........hard

5. ...........have you liver here?-For about 10 years

6.She's bought a computer..............a week

7.The garden is the same..............the one I saw last week

"Can you carry my bag?".Mai asked her friend
 -->Mai asked her friend.............
"Don't talk in class." The teacher said to Minh
-->The teacher asked Minh.............

My brother said to me "Don't stay up late!"
-->My brother told me....................