— ______ late for school again , Tom ! —Sorry, I ______ .
A:Don't ; won't
B:Don't be; won't
C:Don't be; don't
D:Don't; will
如图,将四边形ABCD先向左平移3个单位,再向上平移2个单位,那么点A的对应点A′的坐标是(_ )
下列哪项不属于生物对环境的影响?( )