6White-collar workers across China are becoming____ concerned about the impact of the global financial crisis on their careers

The worsening ofglobal warming, _____human activities are to blame, has led to frequentlyextreme weather.

Excuse me, what’s this for—It’s a cleaner and ittopick up dirt.

Is your mother at home —- No, she ______ for an hour.

The chairman asked me to ________the report, because he didn’t want to speak for too long at this meeting.