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1.
There are both many good things and many potential dangers in social network
It's important for parents to teach their children how to use social media wisely
Social network is the start of bad things like cyberbullying
2.
A recent report has said that many teenagers have contacted online with strangers and it makes them feel scared or uncomfortable.
Others receive onine advertising that is inapproriate for their age.
It is important that parents should be aware of what children are doing online.
Parents should make their children understand that they respect children's privacy.
However, parents want to make sure that their children are safe.
cảm ơn trước 
Từng tranh theo từ trên xuống và qua rồi đó bạn ^^ hay để mình chụp từng bài gửi nha
a)Why did Hoa go to school late this morning?
-Because she watched TV late last night.
b)Why does Nam have to cook the dinner?
Because his mother will be home late.
c)Why will Mrs.Vui be home late?
-Because she will visit her mom.
d)Why did Ha fail her English text?
-Because she played games.
e)Why didn't Ha go to the movie?
-Because she have to wash the bowl and clean the kitchen floor.
b)Bao helpped hí friends in the orphanage and played volleyball last week
c)hoa and hẻ friends raise fund for the poor by selling their embroderies in the school student's shop
d)song always plays soccer every saturday afternoon but lát saturday afternoon he played báketball
e)the students like taking care of the trees in the parks.they planted and watered for trees àd flowers in kim dong park last weekend
f)hung love attending the class social activities .he helps for the elderly and the street childen every saturday and sunday
1 rides
2. collect
3. didn't go
4. bought
5. haven't plan
6. will go
7. have learnt
8. Has Peter visited
9. listening
10. didn't study
1 rides
2 collect
3 did not go
4 Bought
5 have not planned
6 will go
7 have learnt
8 Did Peter and his parents visit
9 listening
10 did not study
18. iron-doing
19. wakes
còn lời giải chi tiết thì... mk ko biết .-.
18. help somebody do sth: giúp ai làm gì
hate doing sth: ghét làm gì
19. wakes - Đặt điều kiện trong tương lai thì mệnh đề điều kiện dùng thì hiện tại: KHi Harry thức giấc, chúng tôi sẽ nói cho anh ấy biết tin tức tốt lành này.