题干
There __________ a big tree in front of my house . I could hear many birds sing in it .
A：used to be
B：is used to be
C：used to have
D：was used to be
答案(点此获取答案解析）
A
”、“有钱更敢花”、“有钱花得舒心”，与之相对应的有效措施是：