Nearly four hundred supermarkets in Beijing are preparing to dim(使暗淡) their lights ________ the "Earth Hour 2010" on Saturday night.
Only when Tom fully recovered______back to work.
The couple finally bought the house they wanted, for they______enough money.
You look so tired. You______have stayed up late again.
- Has Tom already finished his new story? - I Have no idea. He______it last month.
To write your report, you may refer to books 19th______century Englist literature.