I don't think ___ possible to master a foreign language without much memory work.
_________ sweet, the flowers in the botanic garden attract the visitor.
Sorry, Madam. You’d better come tomorrow, because it’s ______ the visiting hours now.
---Have you heard of Wang Meng? ---Yeah, she ______ have done better. She won China’s first gold medal at Turin.
He was busy writing a story, only ____ once in a while to smoke a cigarette. A. to stop B stopping C to have stopped D having stopped
The computer system suddenly ____ while he was searching for information on the Internet.