My brother has a ______ son. [ ] A. four
题型:选择题
问题:
My brother has a ______ son. [ ]
A. four-years-old
B. fourth-year-old
C. four-year-old
D. four-year-olds
My brother has a ______ son. [ ]
A. four-years-old
B. fourth-year-old
C. four-year-old
D. four-year-olds