I …………………………….. him for a long time. A.have known B.knew C.had known Answer and Feedback Answer:A Feedback:In sentences with since and for, we normally use the present or past perfect tense in the main clause. do you want? view more test Xem thêm Share this post Some other questions you may be interested in. Express a speed of 36 kmph in meters per second? Express 25 mps in kmph? The speed of a train is 90 kmph. What is the distance covered by it in 10 minutes? A car covers a distance of 624 km in 6 ½ hours. Find its speed? In what time will a railway train 60 m long moving at the rate of 36 kmph pass a telegraph post on its way? A train 240 m in length crosses a telegraph post in 16 seconds. The speed of the train is? The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car? Walking with 4/5 of my usual speed, I miss the bus by 5 minutes. What is my usual time? If a man walks to his office at ¾ of his usual rate, he reaches office 1/3 of an hour late than usual. What is his usual time to reach office? Walking 7/6 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?