---When will the expert come and give the lecture on economic development?---Not until our program_______.
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.