Yuan Longping is a Chinese rice scientist is leading a search to develop "sea rice".( )
A.whoB.whichC.whom
—Mum, I’ve heard that we can’t eat ____ these days. Is it true? —Take it easy. It is safe to eat cooked meat.
—How many _______do you have?
Here are many_______ and________.
This blue pen is .
Look! Some ______ are in the school.