Tom opened a bookstore in NO.3 Middle School, but it closed down.
A. ever since
B. just then
C. before long
D. soon after
网友回答
A. ever since
B. just then
(答案→)C. before long
D. soon after
解析：考查词组：A. ever since自从那时B. just then就在那时C. before long不久以后D. soon after之后很快，句意：汤姆在第三中学开了一家书店，但不久就倒闭了。选C。