1. I don't know who invented _____ iphone, but I think it is _____ useful invention.
A. the; a B. the; the C. an; the D. an; a
2. Rose is Mr. Smith's secretary, so she has _____ to all his business e-mails.
A. power B. account C. way D. access
3. —Have you got enough tickets?
—Not yet. We just need _____ one.
A. other B. the second C.another D. the other
