Fill in the gaps with a suitable preposition if necessary.

120- The clerk said she was tired................... hearing complaints day after day.

121- My English teacher said he was quite satisfied .............. my knowledge.

122- He is just getting ............. his several illness.

123- When he go abroad, he travels ................. the name of Brown.

124- In my opinion, travelling by air is preferable........... travelling by train.

125- We complained .............. the landlord ........... the condition of the house.

126- I think the treasurer strongly disapproves ............. our new system.

127- ............. the way, don't forget our meeting next week.

128- She is clever .......... music.

129- He is angry ................ losing his wallet.

130- He repeated the conversation that he had heard word .............. word.

131- He doesn't care ........... working at all.

132- The boy fell ............. the stairs and broke his arm.

133- I've bought a car ........... $2000; It was a real bargain.

134- I have no doubt ............. your capacity.

135- This is a story based ............. fact.

136- If you keep ............. trying, you'll master them.

137- He earns his living ............... selling vegetable.

138- ............. my way home, I met a lot of adults who were going to work.

139- What are your ideas .................... the subject?

140- They are here ................. holiday .I'm here ............ business.

I. Combine sentences using: who(m), whose, where , when, which or that

31- A simplified edition is easier to read than the original. It's shorter.
............................................................................................................
32- The man's wife was killed at home. The police came to question him.
............................................................................................................
33- They live in a small village. It is not far from the Red river.
............................................................................................................
34- He came to Hollywood when he was 20. He became a film star there.
............................................................................................................
35- I was sitting in the chair. It suddenly collapsed.
............................................................................................................
36- A girl was injured in the accident. She's now in the hospital.
............................................................................................................
37- The man came here last week. He's living next door to us.
............................................................................................................
38- The car broke down after 5 km. I hired that car.
............................................................................................................
39- You sent me a present. Thank you very much for it.
............................................................................................................
40- There wasn't any directory in the telephone box. I was phoning from that box.
............................................................................................................

Cho hỗn hợp X gồm ancol etylic và butanol-2 (CH₃-CHOH-CH₃) và axit sunfuric đậm đặc. Viết các phương trình hóa học xảy ra khi
a) Đun nóng hỗn hợp X ở nhiệt độ 140°C 
b) Đun nóng hỗn hợp X ở nhiệt độ 180°C.

bài 1:Cho hỗn hợp X gồm ancol etylic và butanol-2 (CH₃-CHOH-CH₃) và axit sunfuric đậm đặc. Viết các phương trình hóa học xảy ra khi
a) Đun nóng hỗn hợp X ở nhiệt độ 140°C 
b) Đun nóng hỗn hợp X ở nhiệt độ 180°C.

bài 2: hoàn thành sơ đồ chuyển hóa sau

\(A\rightarrow B\rightarrow D\rightarrow E\rightarrow F\rightarrow Y\rightarrow M\underrightarrow{_{1500^oC}}Q\)

\(Q\rightarrow Q_1\rightarrow Q_2\left(polime\right)\)

\(Q\rightarrow Q_3\rightarrow Q_4\rightarrow Q_5\left(polime\right)\)

A là 1 loại gluxit, khi đốt cháy A thu được \(\dfrac{m_{CO_2}}{m_{H_2O}}=\dfrac{8}{3}\)

E làm quỳ tím hóa đỏ

Y là muối hữu cơ có kim loại chứa 39,8% khối lượng

Nguồn điện có khả năng cung cấp dòng điện để các thiết bị điện hoạt động.

Mỗi nguồn điện đều có hai cực là cực âm (kí hiệu bằng dấu -) và cực dương (kí hiệu bằng dấu +).

mng giúp em vs ạ

em cần gấp ạ

Hoàn thành sơ đồ chuyển hóa sau:

X+H₂O→CH₃CHO

X+Y→A1

A1+H₂O→CH₃CHO

X+Z→A2

A2+H₂O→CH₃CHO

A2+Y→A4

A4+H₂O→CH₃CHO

A1+Y→A3

A3+H₂O→CH₃CHO

Biết : Y là chất vô cơ, các chất X, Z, A1, A2, A3, A4 là các chất hữu cơ.

A1, A3, A4 là các dẫn xuất clo; A2 là este không no.

R-CH=CH-OH (không bền) → R-CH₂-CHO

R-CH(OH)₂ (không bền) → R-CHO +H₂O