All parents love their children, ______ they make mistakes.
Without the ‘ greenhouse effect’, the earth ____ be about thirty-three degrees Celsius cooler than it is.
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______.
Film has a much shorter history, especially when ______ such art form as music and painting.
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