1,mountainous
2, interesting
4,nearby
6,collection

D=ab(a+b)+bc(b+c)+ac(c+a)+3abc
= ab(a+b)+abc+bc(b+c)+abc+ac(c+a)+abc
= ab(a+b+c)+bc(b+c+a)+ac(c+a+b)
=( ab+bc+ac)(a+b+c)

8,where is the bank?
9, how is the dress?
10, when did you see her?
13, who bought a poster

1, If she knew anyone there, she would live in London
2, If I had a spare ticket, I could take you to the concert
3, If they understanded the problem, they would find a solution
4, If Carol had 't study, she would have answered the phone
5,  If Rita had gotten any sleep last night , she would have  exhausted today

lộn b nha

C. If you take more exercise, you will feel healthier.

1,These oranges are enough ripe for you to eat .
2,They aren’t enough tired to sleep.
3,She is enough old to drive a car.
 

đầu bài là gì vậy bạn để mk biết đường làm

BT 1
1B    ;    3D   ;   4D   ;   5C
BT 2
1, as fast as
2, not as tall as
3, not as low as
4, as worse as 
5, as optimistic as
6, not as windy as
7, as delicious as
8,not as sweet as
BT 3
1, more interlligent
2, older