Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.

So much of interest______that most visitors simply run out of time before seeing it all.

________ she is not so cheerful ________ she used to be?

_____ you eat the correct foods _____ be able to keep fit and stay healthy. 

Only after spending several nights working on the math problem         to wonder whether the problem was wrongly set.