We .....................… each other since A.know B.knew C.have known D.had known Answer and Feedback Answer:C Feedback:The present perfect is often used to talk about how long present situations have lasted. do you want? view more test Xem thêm Share this post Some other questions you may be interested in. Which is the ………………………….. of all metals. Her husband is ten years ……………………………… than her. All of us are bad singers, but I sing the ………………………….. of all. I think you require a ………………………….. diet. Which is the ………………………… part of India? It was the ……………………….. moment of my life. I don't know ...................................... I would get the job. They cancelled the match .............................. bad weather. He still drives that old car ............................... he has enough money to buy a new car. I learned Spanish ............................... be able to find a job during my stay in Spain.