1 . Starting in the Yuan Dynasty, work on the terraces took hundreds of years, until its ________ (complete) in the early Qing Dynasty. (所给词的适当形式填空)

2 . Starting in the Yuan Dynasty, work on the terraces took hundreds of years, _________ its completion in the early Qing Dynasty. （用适当的词填空）

3 . It is found that people are more creative following the ______ (complete) of a boring task. (所给词的适当形式填空)

4 . The large steel factory was ________ in 2022, whose ________ meant plenty of job chances for the local residents. (complete) (所给词的适当形式填空)

5 . Repair work is scheduled for ________(complete) in April.(所给词的适当形式填空)

6 . The large steel factory was finally ________in 2010, whose ________ meant plenty of job chances for the local residents.（complete）（所给词的适当形式填空）

7 . Their timely help and generosity led to the ________ (complete) of the bridge.（所给词的适当形式填空）

8 . The ________ (complete) of this bridge highly facilitates the trips of people across the river banks. (所给词的适当形式填空)