求英语高人速解几道英语语法选择题!

求英语高人速解几道英语语法选择题!
1.we should help those still ____ for independence.
A struggle B struggling c struggled d to struggle
2. I regret ____ harder while young
A not having worked B not work C not have worked D not to work
3.We ____tremendous changes in the city
A glimpsed B withessed C looked D improved
4._____ the football game has been decided not to put off
A Heavily as did it rain B As it rained heavily C Heavily as it rained D As heavily as it rained
5 we must keep a secret of the things ____ here ,the general said ___at the man in charge of the information office
A discussed ,started seriously B being discussed,seriously starting C to be discussed ,seriously started D having been discussed,ande seriously stated
6 ____,man could not live at all
A where it not for the sun B If it was for the sun C Had it not been for the sun D If it shouldn’t be for the sun