https://online2.tingclass.net/lesson/shi0529/0001/1240/20-08.mp3
https://image.tingclass.net/statics/js/2012
10. None of the servants was ______ when Mr Smith wanted to send a message.
A. available B. approachable C. attainable D. applicable
<available>
available 可獲得的，有用的
</available>
<approachable>
approachable 可接近的
</approachable>
<attainable>
attainable 可獲得的
</attainable>
<applicable>
applicable 可應用的
</applicable>
