题干
Leftover children（留守儿童）really ____________ their parents when they are at home alone（独自）.
A：wish
B：miss
C：hope
D：study
答案(点此获取答案解析）
B
Leftover children（留守儿童）really ____________ their parents when they are at home alone（独自）.
A：wish
B：miss
C：hope
D：study
在点
处的切线与直线
垂直，则
（ ）