1. He met many friends who encouraged him in his work.

2. He often tells me about the village where he was born.

3. Can you understand the question which he asked you last time?

4. The man whose son we play with every day is an architect.

5. The city where we spent our vacation was very beautiful.

6. The train which arrived two hours late broke down twice on the way.

7. I stopped in a smal ltown where my sister is working.

8. The book which I gave him was rather difficult.

9. The picture which you were talking about has been stolen.

10. She is the girl who I bought these roses for.

11. This morning I met Diana who I hadn't seen for ages.

12. Tulip computers which are made in Holland are very good.

13. I saw a girl whose beauty took my breath away.

14. John, whose mother is in hospital, is absent from school.

I

1 C

2 D

3 B

4 B

5 C

6 B

7 B

8 C

9 C

10 B

II

1 is => was

2 am => were

3 play => playing

4 good => well

5 is => were

6 didn't => hasn't

7 to get => getting

8 can => could

9 serious => seriously

10 which => who

1 would invite

2 sold

3 would buy

4 rains

5 is

6 could pass

7 repaired

8 will help

9 will do

10 learn

11 will have

12 looked

13 fed

14 would understand

15 would arrive

16 wouldn't have had

17 swim

18 press

19 asked

20 would call

21 cycle

22 will miss

23 had

24 woud support

25 will phone

26 goes

27 parked

28 don't wear

29 will get

30 will turn

31 go

32 didn't rain

33 wore

34 would watch

35 had signed

36 would live

37 switched off 

38 would understand

39 had explained

40 would have arrived

41 won't play

42 grew

43 would see

44 didn't have to do

45 hadn't stayed up

46 wait

47 would miss

48 would have help

49 had used

50 would be

I

1 D

2 C

3 A

II

1 C

2 B

II

1 It appears in homes, stores, and even airport

2 Yes, it is

B

1 A

4 A

5 D

1 A new mall will be built here next week

2 Julia has worked for this company for 6 years

3 The man in chief suggested checking everything one more

4 Because it rained heavily, we were late for school

5 It is interesting to go swimming in the river in the summer

1. A new mall will be built here next year.

2. Julia has worked for this company for six years.

3. The man in chief suggested checking everything once more.

4. Because it rained heavily, we were late for school.

5. It is interesting to go swimming in the river in the summer.

THAM KHẢO

Câu 3:

a) Hiện tượng nước bám vào thành ngoài của ly: Vì ly đựng nước đá có nhiệt độ thấp do đó các hơi nước có trong không khí xung quanh ly nước đá gặp lạnh thì xảy ra hiện tượng ngưng tụ thành nước và đọng lại, bám lên thành ngoài của ly nước đá.

b) Khi trồng chuối (hoặc trồng mía) người ta phải phạt bớt lá để giảm bớt sự bay hơi, làm cây ít bị mất nước (do lúc mới trồng chuối rễ chuối còn chưa phát triển khỏe mạnh nên không thể hút nước được).

c) Những ngày lạnh (nhiệt độ bên ngoài thấp hơn nhiều so với thân nhiệt) thì hơi nước bị ngưng tụ tạo thành những giọt nước li ti trông như "sương khói". Những ngày khác thì hơi nước trong hơi thở của chúng ta sẽ "hòa tan" trong không khí ngay lập tức và vì chúng ở dạng hơi nên chúng ta đâu có nhìn thấy !

d) Trong hơi thở của người có hơi nước. Khi gặp mặt gương lạnh, hơi nước này ngưng tụ thành những giọt nước nhỏ làm mờ gương. Sau một thời gian những hạt nước này lại bay hơi hết vào không khí và mặt gương lại sáng.

2.

\(x^2+2x+m+1\le0\)

\(\Leftrightarrow m\le f\left(x\right)=-\left(x+1\right)^2\)

Yêu cầu bài toán thỏa mãn khi:

\(\Leftrightarrow m\le maxf\left(x\right)=max\left\{f\left(-1\right);f\left(3\right)\right\}=0\)

Vậy \(m\le0\)

3.

\(f\left(x\right)=x^2-2mx-3m\le0\)

Yêu cầu bài toán thỏa mãn khi:

\(\left\{{}\begin{matrix}\Delta'\ge0\\f\left(-1\right)\le0\\f\left(3\right)\le0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}m^2+3m\ge0\\1-m\le0\\-9m-9\le0\end{matrix}\right.\Leftrightarrow m\ge1\)

Vậy \(m\ge1\)