_____ and I will hit you.

　 A. If you say that again 　 B. Say that again

　 C. Say you that again 　  D. You’ll say that again

______, I think, and all the problems could be settled.

A. If you make more efforts　　 B. Making more efforts

C. A bit more effort　　　　　 D. To have made more efforts

What would have happened _____, as far as the river bank?

    A. if Bob has walked farther     　　 B. if Bob should walk farther

    C. had Bob walked farther    　　　　 D. should Bob walk farther

_____, I think, and the problems could be settled.

A. If you double your efforts　　　　　 B. So long as you keep up your spirits

C. Making greater efforts　　　　　　 D. A bit more efforts

_____ and I will hit you.

　 A. If you say that again 　 B. Say that again

　 C. Say you that again 　 D. You’ll say that again