by the bed was still there. Nothing was stolen.

There are three suspects - Mrs Smith (Mr Smith's wife)，Eric Smith (their son)，and David (Mr Smith's boss). Everyone has the motive to kill him. Mrs Smith can get all her husband's money if Mr Smith is dead while Eric wants to marry his girlfriend，Linda， but his father hated her. As for David，Mr Smith knows a big secret about him. He is worried that one day he might be fired because of the secret and Mr Smith might take over.

I think David is the murderer. He went to Mr Smith's house and tied him up. He then made a phone call to his friend， saying that he was calling from home. While he was talking to his friend，he killed Mr Smith.

The police should make a further investigation into the case and arrest David as soon as possible.

Chapter 4

Vocabulary A 1. realize

2. unaware 3. hardly 4. railway 5. judge B 1. type

2. opinion 3. control 4. operate 5. raise 6. company 7. disagree 8. modern

Language

Common errors

1. This beach is more dangerous than the other one. 2. Your marks in the maths test\ 3. My question is more difficult to answer than yours. Al 2. larger

3. more difficult

4. earlier

5. more interesting A2 2. more expensive than

3. stronger than 4. more important than 5. fresher than 6. safer than

7. rainier than 8. hotter than 9. more useful than 10 more crowded than Common error

Sherry is the most careless student in our class. B 2. the oldest

3. the cleverest/the most clever 4. the greatest 5. the weakest

6. the most popular 7. the kindest

8. the most cheerful 9. the most wonderful C 1. farther 2. worst 3. better 4. best 5. worse 6. farthest

D 1. more and more difficult

2. more and more important

3. heavier and heavier; noisier and noisier

4. colder and colder; wetter and wetter (or in reverse order) 5. better and better 6. hungrier and hungrier 7. easier and easier 8. more and more tired E 1. more expensive

2. the cheapest 3. higher

4. the most unusual 5. cheaper

6. the most popular 7. more enjoyable

8. more and more expensive 9. the tastiest

10. luckier 11. the best 12. the lowest

Listening and Speaking A 1. collects 2. computers 3. hardly 4. tiny 5. unaware 6. calculating 7. print 8. operate 9. reasons 10. brains 11. being 12. human 13. greater 14. create 15. ideas B 2 3 4 1

1. d 2. b 3. c 4. a

C 1. c 2. a 3. b 4. b 5. c 6. a

Reading

A a-3 b-4 c-7 d-l e-2 f-5 g-6 2. F 3. T 4. F 5. T 6. F B 1. SUNSUN

2. TALKSOME ... SPEAK-i (or reverse order)，SUNSUN... TT (or reverse order) 3. most

4. SPEAK-i ... TT (or reverse order); more ... METEOR ... SUNSUN (or reverse order)

5. T ALKSOME ... SPEAK - i (or reverse order) 6. SUNSUN ... TT (or reverse order) 7. T ALKSOME ... longest 8. TT... shortest Writing

(Possible answer) Dear Angela

I heard that you are going on holiday this summer. That will be great fun and you can relax after the final examinations.

You said that you are not sure which town to go to. In my opinion， I prefer Mega

to Titan. Here are my reasons: First， you can go to Mega by air and it is faster than by train. Although it is more expensive， I think it is worthwhile. Second， the temperature in Mega is higher，around 33°C. The weather is more comfortable than that of Titan. Since you love swimming， I think you can have more fun on the beach in Mega. Third， the room rate is cheaper in Mega than that in Titan and the food is more delicious too. Finally，there are no cars in Mega，so it is much safer to walk in Mega than in Titan.

Anyway，just enjoy yourself and have a lot of fun. I wish you a happy holiday. Yours Lucy

Mid-term test

Part One

I Listening

A l c 2 b 3 c 4 a 5 c 6 b 7 c 8 c 9 b 10 a

B 11a 12c 13c 14b 15c C 16 b 17 c 18 a 19 b 20 c

D 21 west 22 thirty 23 special 24 wider 25 shopping II. Multiple choice

26 a 27 a 28 b 29 a 30 b 31 b 32 d 33 a 34 b 35 b 36 d 37 b 38 b 39 c 40 c 41 b 42 c 43 c 44 d 45 b 46 c 47 b 48 c 49 c 50 a III. Cloze test

51 b 52d 53 a 54 c 55 a 56 c 57 a 58 d 59 b 60 b IV. Reading comprehension

61 d 62 c 63 b 64 d 65 c 66 a 67 d 68 b 69 b 70 b 71 c 72d 73 b 74 c 75 b 76 c 77 d 78 d 79 c 80 a 81. Because some students feel lots of pressure from their studies or they don't get on very well with others.

82. In a corner，far from the main building.

83. They can either hit it or write on it about what makes them sad. 84. No，not every student.

85. Because he thought it could be dangerous.