试题 试卷
题型：判断题 题类：常考题 难易度：普通
母牛
A：When is the school trip?
B：It's usually in{#blank#}1{#/blank#}．
A. book B. on C. have D. What E. in
{#blank#}1{#/blank#}
试题篮
{#blank#}1{#/blank#}