The changes in the city will cost quite a lot, （ ） they will save us money in the long run.
（A）or
（B）since
（C）for
（D）but
When is Jay's concert? It's （ ） three o'clock （ ） the afternoon of July 18th.
（A）at; in
（B）at; on
（C）on; in
（D）in; on
Come and see me （ ） two or three days' time.
（A）for
（B）after
（C）in
（D）during
