题干
—Who is teacher in your school?
—Mary is．
A：friendlier
B：friend
C：the friendliest
D：friendly
答案(点此获取答案解析）
C
—Who is teacher in your school?
—Mary is．
A：friendlier
B：friend
C：the friendliest
D：friendly
、
为直线，
为平面，若
，
，则
；命题
若