Digital devices are quickly _______, and the price of the old models will soon _______. 
A、invented, soar
B、updated, drop
C、disposed of, decrease
D、upgraded, devalue
Digital devices are quickly _______, and the price of the o - 谈天说地 - 英语口语 - 浙江省高等学校在线开放课程共享平台 | 大学网课搜题引擎