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The real reason for the fire _______ a burning cigarette end.

The beautiful girl stood there until the train ___________.

Have you really realized the part computer has________ in the daily life?

The snowstorm ________ our difficulties.

When you don’t know a word, you can _________ in the dictionary.

China’s economic and social development requires more substantial reforms, as unnecessary government influence on the private sector has _______ an abuse of authority.

Try not to cough more than you can_____since it may cause problems to your lungs.

Chinese vessels ________ 646,000 square kilometers in the southern Indian Ocean in search of the missing Malaysian flight MH370.

Paul's mother had him ________ because she couldn't bring him up herself.

It _______ that Chinese football team beat Japanese team at the last moment in the Universiade in Shenzhen.