单选题 (As soon as) (we've finished) supper, (we'll all) go (to) downtown to see the Sound of Music.
A. As soon as B. we've finished C. we'll all D. to

【正确答案】 B
【答案解析】[解析] 应改为we finish。用一般现在时。在时间状语从句中用一般现在时表示将来。