0Say you're replying by cellular:02br 02br 00I 01b00have been02b00 in the library, 01font00you've been there (most of the time) until 01b00recently, or even until now.02b00 02font02br 02br 00I 01b00was 02b00in the library, 01font
0 Hi,02br 00in that context (where you are asked "where have you been?") I would say there is no difference. Does anyone feel there's any difference? 0-
0 If it is a test or an exam, in my opinion you'd better choose B. 02br 00Even though A is possible, they usually look for tense agreement in question and answer. 0-