Do you know the key to the problem?为什么用to不用for

Do you know the key to the question?这句话里key后面为什么用to而不用of? Do you know the key to the problem?为什么用to不用for Do you have the key ( ) the office Do you have the key _______the door i don’t know the time.Do you have a()?A.key B.ID card C.baseball D.watch Do you know the way? do you know the mean The key didn't ————any of the doors .Do you know why?A.feel B.Fix C.Find D.fit Do you have a key, that is the key to unlock my heart.是什么意思? do you know the time lunchDo you know the time_____lunch? You must know the key to study English is to make ourselves understood. 不是make sb do sth 吗?是不是understood 过去分词做形容词? 改为同义句.How do you like the key ring?______ do you _______ _______the key ring? Do you know the to the question? 将下列句子合并为定语从句1.Is he the man?You are waiting for the man.2.He has found the key.He lost the key yesterday.3.Can you lend me the book?You bought thebook in the library.4.this is the ship.We travelled on the ship.5.do you know th Do you know the girl i__red? Do you know the girl ___ red what do you know about the Do you know the girl over