1．Tower Bridge experience 1
2．Tree rings 3
3．In the future 5
4．Our roomer—Mr.Hyde 7
5．Two stupid businessmen 9
6．Travelling in space 10
7．The Presidents of U.S.A 12
8．An explosion 14
9．Australia 16
10．The old carpenter 18
11．A letter 19
12．13—an unlucky number? 21
13．Snake and cock 22
14．A'Baby' 23
15．Neither do I 24
16．Save the earth 26
17．Diving 28
18．Homestay programme-host fact file 30
19．Future career 31
20．Flight timetable 32
21．Pen pals 33
22．Bill Gates 35
23．Interesting experiment 37
24．The silver cup 38
25．Animals and humans 40
26．A terrible storm 42
27．Teleworking 44
28．Lien Chan's visit to the mainland 45
29．Another mountaineer 47
30．Shenzhou 6 49
31．Three tortoises 50
32．Initial D 52
33．Wild animals in Hong Kong 53
34．Two copies 55
35．Michael Dell 57
36．Edinburgh 59
37．E-talk 61
38．Special Mothers'Day 63
39．A brave taxi-driver 65
40．Follow Me? 67
41．Sports 69
42．Sleep or not? 71
43．Being a volunteer is great! 73
44．Strange creatures 74
45．Junk food 76
46．Bicycles 78
47．International trade 80
48．Secondhand shops in Britain 82
49．Letters 84
50．Harvard University 85
Key 87