问题
填空题
1. Following a logical sequence (逻辑顺序) , can you complete this puzzle? 
Answer:
2. Peter is climbing a tall tree. The tree is 8 metres high. He climbs at four metres a minute, but slips
(滑) down two metres. If you think hard, you'll know how many minutes it takes him to get up.
Answer: _
答案
1. 2,9 2. 3 minutes.
