问题
选择题
Jim went swimming with his parents yesterday afternoon. _______. [ ]
A. So did Mary
B. So Mary does
C. So Mary was
D. So Mary did
答案
答案：A
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Jim went swimming with his parents yesterday afternoon. _______. [ ]
A. So did Mary
B. So Mary does
C. So Mary was
D. So Mary did
答案：A
N2↑+Cl2↑+2O2↑+4X↑。