Question

-- Will you be back _____ five in the afternoon?
-- I am not sure, maybe later than that.       

A. in

B. before

C. for

D. until

Answer 1

B

考查时间状语。“下午五点之前你能回来吗？”“我不确定，可能会比五点晚。”A“在...里”，后跟一段时间；B“在......之前”；C“为了，给”；D“直到”。故选B。