17. If you want to know the train schedule, please ______ at the booking office.
A. acquire B. inquire C. request D. require
<acquire>
acquire 获得
</acquire>
<require>
require 要求，请求，命令
</require>
<inquire>
inquire 询问，盘问，追究
</inquire>
<request>
request 要求
</request>
