Some kinds of birds in winter fly to the south to ______ the cold in the north．

Li Hua’s English is very good.—Yes,and her French ______her English.

Li Ming, don’t forget to turn off the lights before you leave the office, _____?

You can keep all the files and documents you think it is convenient to get them．

Are you afraid ______ This type of anxiety can deeply disturb people’s enjoyment of social relationships.