问题
选择题
1. We had ___________ wonderful time_________the party_______ other day.
A．a,on,the
B．/,at,on
C．a,at,the
D．/,on,/
答案
答案：C
本题是冠词的考查。have a wonderful time就相当于have a good time；the other day表示“前几天”
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CO32－+H3O+
+ 6H+ + 5H2O2＝ 2Mn2+ + 5O2↑ + 8H2O