问题
选择题
This kind of food _cool, clean and dry according to the instruction.[ ]
A. should be carried
B. must be put
C. should be placed
D. must be kept
答案
答案：D
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This kind of food _cool, clean and dry according to the instruction.[ ]
A. should be carried
B. must be put
C. should be placed
D. must be kept
答案：D