一、单项选择（20分）
1. —What do you usually have for ________ breakfast?
—A piece of bread and ________ egg.
A.a;an B.不填;the C. a; the D.不填;an
2. I haven’t started it_______.
A.already B. just C. ever D. yet
3. My little son is ________ primary school student.
A. a eight-year-old B. an eight-year-old
C. a eight-years-old D. eight years old
