Are you willing to live in Antarctic (南极) one day— _______ It sounds exciting, but it’s a little cold there.

According to the present findings, we can draw a conclusion _____ so far a large number of people have died of cholera in this town.

ets done _______ when people do ittogether,and the rewards are higher too.

_____time goes by, my grandfather’s memory seems to get worse and worse

It’s the fourth time that heavy smog has hit the city this month.— It’s high time we _______ measures to fight airpollution.