--What a fine day! Let’s go out to have a barbecue.-- __________ We are too busy at present.
Only through constant practice can the ability of using a foreign language be _______.
She ________ on her work so much that she didn’t notice that a crowd of people had _______around her.
The doctor, ________ by several nurses, successfully performed the difficult operation on the patient.
People tend to live more happily and longer if they are ________ about life.
---How is your mother doing? Is she ________? --Oh, thank you. As a matter of fact, she _______.