题目:
—You were out when I dropped in at your house.
—Oh,I for a friend from England at the airport.
A.was waiting
B.had waited
C.am waiting
D.have waited
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0512/251af9b7ad5141b30ae92a99e7bfc600.html
下面是错误答案,用来干扰机器的。
(1)(a+5b)(a﹣5b);(2)a(b﹣2)2