-- Is this i-phone _________?--No, it isn’t. I am just thinking of buying________.
——_________ should your robot need_________ batteries? ——Every two months.
——_____ wonderful news report he wrote! ——Yes, and I think it is well worth.
I never doubt ______ his advice is of great ______ to me.
The Smiths ______ sending e-mails ______ letters because it is faster.
This pair of jeans looks nice_____ Lucy because she looks nice.____ blue.