Ⅰ.用所给动词的正确形式填空
1．By the time they arrived, we ________ (get) everything ready.
答案：had got
2．By the end of last year,10 000 trees ________ (plant) in that village.
答案：had been planted
3．The new suspension bridge ________ (design) by the end of last month.
答案：had been designed
