1 . Historically, Chinese immigrants ________ in the area during the railroad construction and gold rush period.

2 . Yesterday when I was w_______ on the pavement, I met an old neighbour.

昨天当我徘徊在街头时，我遇到了一位老邻居。

3 . The price of this type of computer ________（变化）in different shops.

4 . You’ll have to ________(替换)those tyres; they’re badly worn.(根据汉语意思单词拼写)

5 . You will have to get ______（允许）from your parents if you want to come.

6 . It suddenly s______（突然想到）me how we could improve the situation．(根据中英文提示填空）