I. 单项选择。
( )1. --Should we take measures _____ the population?
--I think so. There are too many people in China at present.
A. to control B. to stop
C. to increase D. to help
( ) 2. –Would you like to go out with me, Sam?
--I’d love to, but I have a lot of homework ____ at present.
A. do B. doing C. to do D. to be done
