exercising, and you’ll be healthier.A. Keep B. To keep C. Keeping
The scientists in China are trying __________ the ways to reduce the fog and haze (减少雾霾).
I want to cook ________ for my parents.
----________ is he staying? ----For a month.
I would like to know something about Lao She. The more information, the ___.
The Yellow river is the second ______ river in China.