1.when the train arrived,we got on it at once(保持原句意思）

1.when the train arrived,we got on it at once(保持原句意思）
we got on the train____ ____ _____ it arrived
2.l won't go to the party unless l'm invited(保持原句意思）
l won't go to the party ___ i'm invited
3.please decide immediately thich course you will take (改为简单句）
please decide immediately thich course_____ ______
4.shops reduce the prices at weekends to attract more customers.(保持原句意思）
shops reduce the prices at weekends _____ ______they can attract more customers
5.we don't know what we should do with the rubbish.保持原句意思）
.we don't know ______ ______ with the rubbish.
6."is that bridge the world's lngest sea bridge?"Cathy asked me(改为宾语从句)
Cathy asked me_____ that bridge _____ the world's lngest sea bridge
7.the weather all over the world becomes more _____ than before.(change)
8.nowadays young people may need to go through several______to find a job(interview)