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用be 动词的适当形式完成句子。

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用be 动词的适当形式完成句子。
1.There ____ ( be) a great number of books in the shelves.
2. The number of guests invited ____ (be) 50,  but a number of them ____ (be)absent for the heavy rain.
3. Quantities of water ____ (be) polluted now.
4. A great deal of oil ____ (be)poured into the sea and did great harm to creatures in the water.
5.  Many a  famous  writer ____  ( be) an  alumnus ( 撰搞人) of a local newspaper.
用be 动词的适当形式完成句子。
1. are  2. was; were  3. are  4. was  5. is