Question

have you watered those flowers tim no but they

---Have you watered those flowers，Tim？
---No，But they_____ by my grandpa yesterday morning．（　　）

A. have been watered

B. had been watered

C. were watered

D. were watering

Answer 1

答案：C．
首先根据时间状语yesterday morning，判断句子中的谓语动词用一般过去时，主语they（those flowers）是动作water的承受者，表示“花儿被浇”，所以用被动语态，一般过去时被动语态的构成是：主语+was/were+动词的过去分词，主语是they，be动词用were，water的过去分词是watered，故选C．