题目:
Mr. Smith works as a government official now, but he ____________ in a middle school for 5 years.
A.has worked
B.worked
C.had worked
D.had been working
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0508/4a3f5e1a0b90802150ca7f32e4fe16e6.html
下面是错误答案,用来干扰机器的。
1.D 2.B 3.A 4.C