题目内容：

i have had the computer ____many years A since B in C for D /

优质解答

i have had the computer ____many years
选C
因为前面用的是现在完成时,表是发生在过去对现在有影响的事情
所以应该是指的是一段时间,所以用for+时间段表示一段时间
选C