66 up

67 whatever

68 light

69 there

70 on

71 get

72 having

73 going

74 yet

75 on

1 It was such a difficult climb that we stopped to rest several times

2 She didn't ran fast enough to win the race

3 It was such a heavy bag that I had to ask for help

4 The house is too small for us to live in

5 Jack's suit was so elegant that everyone complimented him

6 My sister is not old enough to watch horror films

7 My mother is such a wise person that people often aske her for advice

8 The package is not light enough for you to lift by yourself

9 This book is too old for the children to eat

10 It was such an interesting book that I couldn't put it down

11 It is such a weak bird that it can't fly

12 These boyss aren't old enough to watch that film

13 They are such small sandals that they don't fit me

Bài 3:

b: Xét ΔABC có

I là trung điểm của BC

IK//AC

Do đó: K là trung điểm của AB

Xét ΔABC có

I là trung điểm của BC

IH//AB

Do đó: H là trung điểm của AC

Xét ΔABC có 

K là trung điểm của AB

H là trung điểm của AC

Do đó: HK là đường trung bình của ΔABC

Suy ra: HK//BC

c)\(\left(1+\dfrac{1}{2}\right)\left(1+\dfrac{1}{3}\right)\left(1+\dfrac{1}{4}\right)....\left(1+\dfrac{1}{2020}\right)\left(1+\dfrac{1}{2021}\right)\)

\(=\left(\dfrac{1.2}{1.2}+\dfrac{1}{2}\right)\left(\dfrac{1.3}{1.3}+\dfrac{1}{3}\right)...\left(\dfrac{1.2021}{1.2021}+\dfrac{1}{2021}\right)\)

\(=\dfrac{3}{1.2}\cdot\dfrac{4}{1.3}\cdot\cdot\cdot\cdot\dfrac{2022}{1.2021}\)

\(=\dfrac{3.4.5...2022}{\left(1.1.1....1\right)\left(2.3.4...2021\right)}\)

\(=\)\(\dfrac{3.4.5...2022}{2.3.4...2021}\)

\(=\dfrac{2022}{2}=1011\)

\(d\))\(\left(1-\dfrac{1}{2}\right)\left(1-\dfrac{1}{3}\right)....\left(1-\dfrac{1}{199}\right)\left(1-\dfrac{1}{200}\right)\)

\(=\left(\dfrac{2}{1.2}-\dfrac{1}{1.2}\right)\left(\dfrac{3}{1.3}-\dfrac{1}{1.3}\right)....\left(\dfrac{200}{1.200}-\dfrac{1}{1.200}\right)\)

\(=\dfrac{1.2.3....199}{\left(1.1.1....1\right).\left(2.3.4....200\right)}\)

\(=\dfrac{1.2.3...199}{2.3.4...200}\)

Nếu mik làm sai mong bạn thông cảm

ý d đáp án là\(\dfrac{1}{200}\) mình quên ghi

My taste in art is not the same as my sister's

I think romantic films aren't as interesting as action films

I don't speak Japanese and my new friend doesn't, either

Nester goes climbing less than before

He's had a cold for 2 days because he didn't wear enough clothes

I will spend an hour gettign this task done

My father prefers tea to coffee

Eat less or you will be obese

1 B. other (forms ở số nhiều $\rightarrow$ other forms)

2 D. important (đứng trước danh từ form, chọn tính từ hợp nghĩa)

3 A. sung (cấu trúc bị động đi kèm composed and sung)

4 A. ago (hundreds of years ago - hàng trăm năm trước)

5 C. who (mệnh đề quan hệ chỉ người who originally composed them)

6 C. instruments (nhạc cụ: flute, accordion, etc.)

7 D. also (được gọi là... cũng được gọi là...)

8 A. bad (protest songs phàn nàn về những điều tồi tệ: bad things)

1 He didn't remember anything about the event, and neither did she. (Hoặc: He didn't remember anything about the event, and she didn't either.)

2 She doesn't sing as beautifully as her sister.

3 I think no students in the class are cleverer than Nick. (Hoặc: I think no students in the class are as clever as Nick.)

4 I go to the same school as my cousin.

5 My friend will never have such a chance again, and neither will I. (Hoặc: My friend will not have such a chance again, and I won't either.)

6 For me, an ape isn't different from a monkey.

7 Jack doesn't sleep as much as he should.

8 By using public transport more, we can reduce air pollution.

9 Her father has been working as a television reporter since she was born. (Hoặc: Her father has been a television reporter since she was born.)

10 Last year he worked harder and more carefully than he does this year.

Thứ tự sắp xếp: 3 – 2 – 4 – 1 – 6 – 5

1 A. Music In Life

2 D. Music has made people's life less entertaining

3 B. it makes us calm in our daily life

4 C. unanswered

5 C. Music has long been a wonderful way for man to enjoy life and understand each other.