答案：compared

　　20.At the age of 29，Dave was a worker，(live) in a small apartment near Boston and(wonder) what to do about his future.

　　解析：分析句子结构可知，空白处在句子中作状语，同时，根据and连接的动词跟其逻辑主语的关系可知，应该用动词的­ing形式。

　　答案：living；wondering

　　.用所给动词的适当形式填空

　　Happiness is something to do with simplicity.

　　I 　1　(pass)the house when I suddenly heard a shout of joy come from the other side of the wall.

　　I peered over.There stood Sir Henry 　2　(do)nothing less than a dance of completely unashamed ecstasy (入迷).Even when he observed my 　3　(puzzle)face staring over the wall，he did not seem 　4　(embarrass)，but shouted for me 　5　(climb)over.

　　“Come and see，Jan.Look！I have done it at last！”

　　There he was，　6　(hold) a small box of earth in his hand.I observed three tiny shoots out of it.

　　“And there were only three！”he said，his eyes 　7　(laugh) to heaven.

　　“Three what？”I asked.

　　“Peach stones (桃核)”，he replied.“I've always wanted to make peach stones 　8　(grow)，even since I was a child，when I used to take them home after a party.And I used to plant them，and then 　9　(forget)when I planted them.But now at last I have done it，and，what's more，I had only three stones，and there you are，one，two，three shoots，”he counted.

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