---Mr. White didn’t come last night, did he? ---No. We for him. A whole night was wasted. A. had waited B. have been waiting C. were waiting D, had been waiting
The operation is ________ success and the patient is now out of ________ danger.
—Have you seen ________ pen?I left it here this morning. —Is it ________ black one?I found it in the corner.
Keeping a diary is ________ good habit,by which you'll make ________ great progress in writing.
I don't know who invented ________ iphone,but I think it is ________ useful invention.
—Which of the twin brothers is easier to get on with? —________ younger one.He is ________ most humorous man.