单选题 --Were they late for the play?
--Not really. As soon as they ______ themselves in their seats in the theatre, the curtain ______.
A. settled; went up B. settled; had gone up
C. were settled; went up D. were settling; had gone up

【正确答案】 A
【答案解析】[解析] 短语辨析
[解析] 这道题就是考查as soon as这个词组的用法，他表示“一……就……”，go up是表动作，“爬上，登上”，不能用完成时。