7. Although sales have continued to increase since last April, unfortunately the rate of increase has ____ .
(A) resurged
(B) decelerated
(C) retarded
(D) capitulated
(E) retaliated
(F) persevered
选BC
翻译：尽管从去年四月起销量在持续上升，可惜增长率已经下降。
resurge 复活，重新席卷
decelerate 减速
retard 减速，拖住，受到某种影响而延迟
capitulate 投降，屈服
retaliate 报复，以牙还牙
persevere 坚持不懈
