1 A for B on C by D at
2 A but B however C besides D moreover
3 A choice B processing C supply D production
4 A them B those C him D it
5 A and B or C but D yet
6 A soon B far C much D many
7 A services B kitchens C hygiene D foods
8 A hotels B houses C buildings D generals
9 A supported B enriched C contaminated D washed
10 A heavy B clear C high D poor
11 A to B about C from D around
12 A use B think C take D work
13 A highly B never C not D less
14 A Certainly B Interestingly C Surprisingly D Similarly
15 A once B twice C call D work
参考答案：A B C D AB D A C DA C D D A
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