题干
—When should I hand in my paper?
—It after class.
A：must be handed in
B：is handed in
C：was handed in
D：will hand in
答案(点此获取答案解析）
A
—When should I hand in my paper?
—It after class.
A：must be handed in
B：is handed in
C：was handed in
D：will hand in
，给出下列四个命题
上是减函数；
是函数图象的一条对称轴；
的图象可由函数
的图象向左平移
而得到；
，则