If you ________ hard at high school, you ________ a college student now．

1. A.
   had studied; would be
2. B.
   study; should have been
3. C.
   had studied; will be
4. D.
   study; must be

从所给的四个选项中选择最佳答案

If you ______ hard , you ______ success sooner or later．

[　　]

A．worked , will win　　　  B．work , will win

C．worked , have won　　　D．work , would win

If you ________ hard before, you ________ the answer now．

1. A.
   studied; could
2. B.
   had studied; could know
3. C.
   had studied; are knowing
4. D.
   studied; are knowing