Not long after it, Burr's lab hit financial difficulties. Heinricher had no experience running a tissue culture operation, but she wasn't prepared to quit. So she bought the lab.

　　Today Heinricher heads up a profitable multimillion­dollar company, working on species from all over the world and selling them to wholesalers(批发商). “If you want to farm bamboo, it's hard to do without the young plants, and that's what we have，” she says proudly.

　　16．What was the main problem with planting bamboo widely?

　　A．They didn't have enough young bamboo.

　　B．They were short of money and experience.

　　C．They didn't have a big enough farm to do it.

　　D．They were not understood by other people.

　　17．What does Heinricher think of bamboo?

　　A．Fragile and affordable.

　　B．Productive and flexible.

　　C．Useful and earth­friendly.

　　D．Strong and profitable.

　　18．The underlined word “renewable” in Paragraph 6 probably means “________”．

　　A．able to be replaced naturally

　　B．able to be raised difficultly

　　C．able to be shaped easily

　　D．able to be recycled conveniently

　　19．What do you learn from the passage?

　　A．Heinricher's love for bamboo led to her experiments in the lab.

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