Without the ‘ greenhouse effect’, the earth ____ be about thirty-three degrees Celsius cooler than it is.
A．should B．would C．will D．must
During the Middle Ages, a conventional artist was not interested in showing nature and people _____they really were.
A. who B what C. like D. as
________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.
