【評論主題】181. The country has been ________ the border defense in preparation for war. (A) stretch (B) streng

【評論內容】第一次看到C、D的答案竟然一模一樣

【評論主題】103. When entering the facility, disks authorized by a pass, must be declared and _______ for viruse

【評論內容】這題不懂，如果代入 scanned for ,後面再接 for viruses ？ 不就兩個 for ？