Success in life doesn’t happen_____. It’s the result of devoting yourself to what you’ve set out to do.

The old man was found walking near the river       a cold morning.

_____ my daily work at school, I spare a few hours each day to practice playing the violin at home.

— Sorry, I'm afraid the project will be delayed. Time is so limited!
— Take it easy. You will have two assistants ______. 

The nurse allowed the visitors to remain     the visiting hours，though it was not permitted.

Circumstances are       human control, but our conduct is in our own power.

Heavy smog blankets Beijing．        ,city authorities start using its new smog warning system．

Measures have been taken to fight ________recurring food safety problems, but there is still a long way to go before China can rid itself ________ these issues.

  —I've got a bad cold．Can I take two days ____, Mr．Cage?
—Yes, by all means．Take care．