The house caught___fire last night but no one knows who set ___fire to it. A. X;X B.X;a C, a; a D, a; X
Not only _____ a promise, but also he kept it.
_____ and caught the mouse.
You should work less _____.
_____ , 1 would accept the invitation and go to the party.
—— Have you ever seen anything like that before? ---- ____.