—The heavy snow hasn't caused any inconvenience to people in Nanjing, has it?—Yes. Just imagine the city ________ with nearly 20 centimeters of snow one night.

I am really sorry if my comments on the matter ____ you. 

The professor ______ his voice to make himself ______.

The film festival is      as an event of international importance．

Many single parents      with the dilemma of dividing time between work and children。