Class 4 students visited the car factory last week.(保持原意）
问题描述：
Class 4 students visited the car factory last week.(保持原意）
Class 4 students ___ a_____to the car factory last week.
答
pay a visit 是访问或在原句是参观的意思.因为原句用的是过去式而且后带last week上一星期,所以pay给为paid.
Class 4 students paid a visit to the car factory last week.