She always looks sad, _____ makes people feel sorry for her.
It is not clear ____the effects of global warming will be.
All the scientific evidence ______ that increasing use of carbon dioxide ______ the rise of the earth’s temperature.
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______.