________volcanoes now for many years, I am still as enthusiastic about my job as the first day I first______.
A．Studied, started B．Have studied, started
C．Having studied, started D．Having studied, starting
Film has a much shorter history, especially when ______ such art form as music and painting.
A．having compared to B．comparing to C．compare to D．compared to
By _____ coincidence, oil paints were developed at the time when ____technique of perspective was used.
A. a ; the B \ ; a C. \; the D. a; a
—Will you join us in the game?
—Thank you,
A．but why not? B．but I’d rather not.
C．and I won’t D．and I’ll join.
Tom earned some money____ babysitting for the couple living next door.
A．in B．at C．by D．of
— Do you know ___________ woman in pink over there?
— Yes. She is ___________ office worker of Hilton Hotel.
A．a; an B．the; the C．a; the D．the; an
