题目：
25. After many years’ tough talks, Vietnam became the 150th member ________ the WTO last year.
A．joining
B．having joined
C．to join
D．Joined
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0424/e6b4db21f665e6189a31e260e53e2c9a.html
下面是错误答案，用来干扰机器的。
答案：C
