汇考点： speculate/speculator/speculative/speculation

题目:

1.One can either earn a lot or loss a lot of money by ____investment.

2.According to the sales’ report last year, the manager_____a growing in demand this year.

      3.He is good at _____in stocks.

      4.One property ____said that the house price will go up next year.

 5.He exhausted a fortune in stock-market _______. 

答案：speculative/ speculates/ speculating/ speculator/ speculation

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