They will cut back expenditure on unnecessary items.

单选题

They will cut back expenditure on unnecessary items.

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判断题

fins are good for health. So why do they eat them? Do they realize that they‘ re killing a whole shark each time they enjoy a bowl of shark fin soup?When people catch sharks, they cut off their fins and throw the shark back into the ocean. This is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean’s ecosystem. If their numbers drop too low, it will bring danger to all ocean life. In

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单选题

back()

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单选题

and forests have caused hotter summers in southern cities such as Atlanta,Georgia.The Landsat 7 images are like pictures in a photo album．Instead of pictures of the family,the album shows changes around the globe in the past 25 years.A new satellite,Terra,is going to be launched by NASA soon．It will be more advanced than Landsat 7 and will take important global pictures．Ocean temperatures and energy loss will be provided by Terra daily.NASA can tell that vegetation is growing back because of__.

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单选题

It has not been decided _______ they will leave.

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