問題詳情：
同義句改寫。
1． They were visiting the zoo.
They were________ ________ ________ ________ the zoo.
2． They built it five years ago.
It________ ________ five years ago.
3． The Black family lived here for more than 10 years.
The________ lived here for________10 years.
4． Was the tree covered by Tom just now?
________ Tom ________ the tree just now?
【回答】
1．on a visit to 2．was built 3．Blacks over4．Did cover
知識點：句型轉換
題型：完成句子
