问题
John isn’t here right now. He ______ Mr. Black’s office. Perhaps he______ in several minutes.
A:is going to; has come
B:has been to; has come
C:has gone to; will come
D:went to; would come;
B:has been to; has come
C:has gone to; will come
D:went to; would come;
正确答案是：
