| The earth is our home. We must take
care of it, for ourselves and for the next generation. This means preserving the
.quality of our environment. Consume, consume, consume! Our society is consumer oriented — dangerously so. To keep the wheels of industry turning, we manufacture consumer goods in endless quantities, and in the process, are rapidly exhausting our natural resources. But this is only half the problem. What do we do with manufactured products when they are worn out They must be disposed of, but how and where Unsightly junkyards full of rusting automobiles already surround every city in the nation. Americans throw away 80 billion bottles and cans each year, enough to build more than ten stacks to the moon. There isn’t room for much more waste, and yet the factories grind on. They cannot stop because everyone wants a job. Our standard of A. ( their wastes were covered over by nature B. ( they were more careful and less greedy C. ( their junkyards didn’t grow tall yet D. ( they had foresight and planning [单项选择]Visitor: Thank you very much for your care while I am at Cambridge.
Host: ______I'm glad you enjoyed the visit. A. Never mind. B. No thanks. C. My pleasure. D. Goodby [单项选择]The topic of your investigation must be something______ .
A. from which you can form your report B. that you are interested in C. that your teacher approves D. that you already have in your mind [单项选择]You must show your receipt （）you want to get your bag.
A. if B. till C. though [单项选择]Only when your identity has been checked,（ ）.
A. you are allowed in B. you will be allowed in C. will you allow in D. will you be allowed in [单项选择]The topic of your investigation must be one _______.
A. from which you can form your report B. that you are interested in C. that your teacher approves D. that you already have in your mind [单项选择]Your mother must be at home, ______ she.
[单项选择]You must shine your shoes.（ ）
A. lighten B. clean C. wash D. polish [单项选择]______ , have all your answers checked once more.
A. If time permits B. Time permitting C. When time permitted D. D. Both andB. 我来回答: 提交
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