问题
选择题
—How many students are there in the classroom?
— ________. They are all in the lab. [ ]
A. Some
B. None
C. All
D. Neither
答案
答案：B
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—How many students are there in the classroom?
— ________. They are all in the lab. [ ]
A. Some
B. None
C. All
D. Neither
答案：B