If you _____ faster,we could have turned in the project before the deadline.A.workB.had workedC.have workedD.workingThe Correct Answer is 2 ,why?

what is even harder to catch if you run faster? If you take the faster train,the trip from Nanjing to Hangzhou _____ only one hour.A.costs B.takes C.needs D.spends If you _____ faster,we could have turned in the project before the deadline.A.workB.had workedC.have workedD.workingThe Correct Answer is 2 ,why? 4. If you _____ faster, we could have turned in the project before the deadline.have worked或had worked请提供答案和讲解？？？说的不一样？ –Hurry up!Can't you drive faster, Jack? --No. If I got _____ speeding tick–Hurry up!Can't you drive faster, Jack? --No. If Igot _____ speeding ticket, my dad would take away my car. A. other B. the other C. ea What's even harder to catch if you run faster?如上! If you go _____ (shop)this afternoon. If you like _____ football.(play/playing) 怎样选择,并说说是那一条语法.4.If you _____ faster,we could have turned in the project before the deadline.A.workB.had workedC.have workedD.working7._____ time do you spend on your homework every day?A.How muchB.How wellC.How oftenD.How l the tortoise faster than you! If you _______very carefully ,you will fail the game.A do not be B will not be C are not D aremy computer works _____ faster than Mille’s.A very B more C most D much已经知道答案,只是不懂为什么选这个答案,简明扼要. Light _____ faster than sound填什么 If you take more exercise ,you will feel much _____. If you meet trouble,you may ask policemen _____ help. If you _____ go quickly ,you will miss the train If you are _____,you'll make many mistakes ____ ____ you _____ if you need the information. If you _____ by taxi,you ______ there more quickly.