题目内容：

If you throw a white book into the Red Sea,what will it become?
2.If three rabbits can three carrots in three days,how many rabbitscan eat one hundred carrots in one hundred days?
3.Why is a river rich?
4.Please work out the missing number:3,5,8,13,22,39,72,_____.

优质解答

1. it will sink

2. 3days

3. because river has bank（岸的意思,银行的意思）

4. 137（65+72）后项减前一项,使得新的前一项的2倍减一等于新的后一项