A．occasion

　　B．discovery

　　C．root

　　D．condition

　　7．John worked hard at his lessons and gained ________ to a famous university last year.

　　A．permission

　　B．admission

　　C．agreement

　　D．freedom

　　8．People should open the window in the morning to make air ________ in order to keep the indoor air fresh.

　　A．spread

　　B．remove

　　C．float

　　D．circulate

　　9．The population of Africa is ________ so rapidly as to cause concern of the whole world.

　　A．expanding

　　B．stretching

　　C．extending

　　D．spreading

　　10．At times, the balance in nature is ________，resulting in a number of possibly unforeseen effects.

　　A．confused

　　B．puzzled

　　C．disturbed

　　D．troubled

　　Ⅱ.阅读理解

　　A

　　Jackie Heinricher's love affair with bamboo started in her backyard. “As a child, I remember playing among the golden bamboo my dad had planted, and when there was a slight wind, the bamboos sounded really musical.”

　　A fisheries biologist, Heinricher, 47, planned to work in the salmon industry in Seattle, where she lived with her husband, Guy Thornburgh, but she found it too competitive. Then her garden gave her the idea for a business: She'd planted 20 bamboo forests on their seven­acre farm.

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