We (impress) ______ by the high quality and fine workmanship of your products when we visited your factory.

【参考答案】

were impressed[解析] 本题考查动词的语态时态。空格后的by表明空格应为动词的被动语态，从句中的visit......

(↓↓↓ 点击下方‘点击查看答案’看完整答案 ↓↓↓)