问题
选择题
Put the ingredients in the container and _______, please.
[ ]
A. mix up it
B. mix it up
C. mix up them
D. mix them up
答案
答案：D
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Put the ingredients in the container and _______, please.
[ ]
A. mix up it
B. mix it up
C. mix up them
D. mix them up
答案：D