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11.Today， ____ trees are still being cut down somewhere in the world. A.much too B.too much C.many too D.too many 12.There are lots of English books here， and ____ of them is easy to understand. A.both B.all C.every D.each 13.Is the shirt on the bed ____ ? A.yours B.your C.you 14.Mr Green taught ____ English last year. A.our B.we C.us 15.These sweaters are too small for me. Please show me ____ one. A.other B.others C.the others D.another 16.Mary cant go with us. ____ has to look after ____ mother at home. A.She; his B.She; her C.He; her D.He; His 17.There isnt ____ paper in the box. Will you go and get ____ for me? A.any; some B.any; any C.some; some D.some; any 18.I often help ____ . | 
