1) chia thì hiện tại hoàn thành hoặc thì quá khứ đơn
1.I (lose)............... my hey, so I can't open the door
2.columbus(discover)............new world in 1942
3.nina(broke)...........her leg,she shill is in a hospital
4.He(live)..........her all his life
5.last winner,he(repair)............the roof of this house
6.she(do)............a new language cause last summer

điền much, many, few, a few, little, a little
1. He isn't very popular. He has..................friends
2. An is very busy. She has........................free time
3. We must be quick. We have.......................time
4. The museum was very crowded there were too.................people
5. Did you take......................photographs when you nere on holiday
6. Most of the town is modern there are................. old building

cho tam giác ABC vuông tại A, đường phân giác BD (D thuộc AC) kẻ DE vuông góc BC tại E.
a) cm tam giác ABD= tam giác EBD

chuyển từ thì quá khứ đơn sang thì hiện tại hoàn thành
bài 1
my boss gave my some money for by birthday
students are doing some experiments now
he can tell you the truth
the painter há painted many nice pictures
bài 2 
we started playing tennis when i was 12 year old
they began eating 2 hours ago
we last looked for her when she lived here

Cho tam giác ABC vuông tại A, AB=6cm ,AC=8cm
a)tính BC
b)kẻ tia phân giác BD của góc ABC cắt AC tại D vẽ DE vuông góc BC tại E cm. tam giác ABD= tam  giiasc EBD
c)tia ED cắt BA tại F, cm. BD vuông góc FC và tam giác BFC cân

1.They clean the floor every morning.
The floor
2.They will solve the problem soon.
The problem
3.They break the glass into small pieces.
The glass
4.They made these cars in the USA
These cars
5.People have used the internet all over the world.
The internet
6.We planted many trees in the school garden.
Many trees
7.Someone has taken my book away.
My book
8.He didn't help me with my homework.
I
 

1.Athough he looks healthy, he has a week heart.
desipte
2.She goes to shopping everyday although she has a lot of clothes.
3.Athough the filen is interesting,i don't like it despite.
despite
4.Athough tony is not intelligent,he studied well.
in spite of

cho f(x)= 3x²+x+1-x⁴+x³-x²+3x⁴
g(x)= x⁴+x²-x³+x-5+4x³-x²
a) thu gọn và sắp xếp casc đa thức cho lũy thừa giảm dần của biến
b) tính f(x) + g(x)
c) tính f(x) - g(x)
d) tính giá trị của f(x) + g(x) tại x=1