In the 1990s.a trip to Zhangjiajie cost less than 500 yuan,but now with the same amount of money you even cover the entrance fee. A.couldn’t B shall’t C.can’t D.won’t
. It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
The author of the report is well _____ with the problems in the hospital because he has been working there for many years.
With the change of the economic foundation the entire immense superstructure is _____ rapidly transformed.
Even if they are on sale, these refrigerators are equal in price to, if not more expensive than, _____ at the other store.
Evidence obtained from observation and experiment is often used to _____ a scientific theory.