题干
Meimei is going to be an older sister. Her parents are planning to have their ________ child.
A：one
B：two
C：first
D：second
答案(点此获取答案解析）
D
Meimei is going to be an older sister. Her parents are planning to have their ________ child.
A：one
B：two
C：first
D：second
