问题补充:
Hurry up, or the tickets out by the time we get there.
A. will have sold
B. will sell
C. have sold
D. will have been sold
答案:
A. will have sold
B. will sell
C. have sold
(答案→)D. will have been sold
解析:本题的含义是快点,否则的话票会被卖完,表示被动的意思,用被动句,结构为be+过去分词,故本题选D。