There I was in this tiny cage with 3 Great White sharks circling around me.I tried desperately to take pictures with my underwater camera，not letting my hands and feet drift(漂)out of the cage.

　　When I took a breath，life above the water seemed chaotic(混乱的)．But，I would drop back under the water and life would seem to stop existing.And the sharks that always appeared frightening on TV or in photographs actually appeared peaceful in person.

　　After an hour，I decided it was probably time for me to get out once the sharks started to become really aggressive.I waited until the very last second I could，since I knew I would probably never do this again.

　　6．What is the text mainly about?

　　A．My travel in Africa for the first time.

　　B．The Great White sharks in South Africa.

　　C．A thrilling experience of spotting Great White sharks.

　　D．The way to protect oneself when meeting with sharks.

　　【解析】　主旨大意题。文章主要叙述了作者在南非旅游时与鲨鱼相遇的刺激经历，所以答案选C。

　　【答案】　C

　　7．When the author and his or her friends had breakfast，________.

　　A．they talked briefly about the plan that day

　　B．they discussed the sharks carefully

　　C．they were nervous about the coming event

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