（）learning has a lot to do with your hard work.

A.X连锁显性遗传
B.X连锁隐性遗传
C.Y连锁遗传
D.母系遗传
E.共显性遗传

A.That is now
B.Which is now
C.What is now
D.All is now

A.step
B.stand
C.point
D.stage