问题
选择题
How long do you think it will be ________ the computer company puts forward a new product?
A.before
B.since
C.until
D.that
答案
答案:A
考查连词。It is/will + 时间段 + before….在……之后……才,句意:你觉得这家电脑公司多长时间能推出一个款产品?