OG160 这个尤其不懂

160. While some propose to combat widespread illegal copying of computer programs by attempting to change people's attitudes toward pirating, others by suggesting reducing software prices to decrease the incentive for pirating, and still others by calling for the prosecution of those who copy software illegally.

(A)  by suggesting reducing software prices to decrease the incentive for pirating, and still others by calling

(B)   by suggesting the reduction of software prices to decrease the incentive for pirating, and still others call

(C)  suggest the reduction of software prices for decreasing the incentive for pirating, and still others call

(D)  suggest the reduction of software prices to decrease the incentive for pirating, and still others by calling

(E)   suggest reducing software prices to decrease the incentive for pirating, and still others are calling

在这里call 是否必须使用现在进行时？？

如果把C那个FOR的错误改正成TO，C是否正确？

STILL在这里是否构成了时态的暗示？？

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=27472&page=1

建议去og总结帖看吧，说的很详细的