However, the U.S. Department of Homeland Security does 40 use the technology for checking employees into some areas and for travelers enrolled in its PreCheck program.
Auntimely
Bcurrently正確答案
Cpreviously
Dspontaneously
答案與詳解
B
正確答案
本題測驗副詞語意與時態搭配,句中使用現在簡單式 does,應選 currently 表示「目前」使用該技術。