—Excuse me how can I get to the museum?-- Sorry. Its my time to he here.A. one B. first

问题补充：

—Excuse me, how can I get to the museum?

-- Sorry. Its my time to he here.

A. one B. first C. once

答案：

解析：考查数词的用法。由句意“这是我第一次来这里”可知正确答案。