21. Many people have come to realize that they should go on _______ balanced diet and make _______ room in their days for exercise.
A. a; / B. the; a C. the; the D. /; a
22. On Nov. 16, 2011 in Gansu, a nine-seat school bus _______ 64 people crashed into a truck, killing 21 people, including 19 children.
A. crowded of B. crowded with
C. was crowded of D. was crowded with
