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I
1.B
2.C
3.A
II
1.A , Used to
2.C Going
3.B .Housework
4.C. Subject
5.B. Good
III.
1. Many _homeless____ families have to live in tents
2. He was very _proud____ of the work he had done.
3. Freedom of _____speech__ is one of the fundamental rights.
4. His sense of __humor__ him from other students.
IV: Give the correct form/ tense of the verbs.
1. They asked us (not go) ...not to go... out alone at night.
2. The children were excited about (open) ..opening........ their presents.
3. She ..has just had........ (just have) dinner.
4. ko bk
V: Complete the second sentence so that it has a similar meaning to the first one.
1. '' How much do you think it will cost? '' he said to me.
- He asked me_how much I thought it would cost_
2. It takes minh 2 hours to do his homework every day.
- Minh spends _2 hours doing his homework every day
3,4,5 ko bk. Chỉ bk chừng đó thôi
Từ x=\(\dfrac{1}{2}\)a+\(\dfrac{1}{2}\)b+\(\dfrac{1}{2}\)c=\(\dfrac{1}{2}\).(a+b+c)\(\Rightarrow\)2x=(a+b+c)
M=(x-a)(x-b)+(x-b)(x-c)+(x-c)(x-a)+x\(^2\)
= x\(^2\)-xb-ax+ab+x\(^2\)-xc-bx+bc+x\(^2\)-ax-cx+ac+x\(^2\)
= 4x\(^2\)-2ac-2bx-2cx+ab+bc+ac
= 4x\(^2\)-2x(a+b+c)+ab+bc+ca
Thay 2x=a+b+c,ta được:
M= 4x\(^2\)-2x.2c+ab+bc+ca
M= 4x\(^2\)-4x\(^2\)+ab+bc+ca
M= ab+bc+ca
Chọn từ được phát âm khác với các từ khác
( = 0,25 x 4 = 1m)
chúc bn
học tốt
THANKS