—We're enjoying this film. —________, we're going home now. It's too late.
Aunt Betty ______ an English teacher since she graduated from the university.
We hope that we ______ more electrical appliances in our house.
---______ book do you like best? ---The one on the left.
What will my lovely son be like______?
The silly crow(乌鸦)wanted to______ its song but none would enjoy it.