测定正视眼的近点距离为20cm，其调节力为多少（）。

A.20D

B.10D

C.5D

D.1D

E.0.5D

—Daddy, do you believe I can swim ______ to catch up with Ben!

—Great, dear! But I don’t have ______ to watch your match. I hope to hear your good news.

A．fast enough, time enough

B．enough fast, enough time

C．enough fast, time enough

D．fast enough, enough time