问题
选择题
As we have planned, we’ll go to Beijing to attend her sister’s wedding party. We’ll also visit our mother school _______we go there.
A．unless
B．when
C．once
D．even if
答案
答案：B
此题考查连词的用法。连词的选择取决于两个分句之间的逻辑关系，本题前面已经说明去北京参加婚礼是已经计划好了的，故应选择表示时间的连词，答案为B。