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阅读下面材料,在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。

There’s no such thing as living alone. Never mind if you’re   1. only person in your house and have no dog, no cat, not even fish. You still have got several billion   2.  (roommate) — and so do we all. Some of them are harmless, some are   3.   (actual) helpful and some could even kill you. They are, of course, bacteria, fungi(菌类) and viruses, and like it or not, they’re on you, around you, and deeply within you. The fact that bacteria life is everywhere is not   4.  (surprise). It’s something you  5.  (learn) from your childhood when your mother told you not to drink water from someone else’s glass. There are lots of bacteria   6.  are living in your tea kettle. There are bacteria 7.  (sleep) with you on your bed. Scientists are beginning   8.   (realize) the richness of the microbiome(微生物群系) — which is as complex as the ones   9.  (find) in oceans, rainforests, deserts and woodlands. Your house has a microbiome and   10.  do you.

高三英语语法填空困难题

少年,再来一题如何?
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