_______ good for our health.
#43570
A
Do exercise is
B
Doing exercise is
C
Do exercises are
D
Doing exercises are
推荐题目
____of the land in that district ____covered with trees and grass.
#86345
A
two fifth; is
B
two fifths; are
C
two fifths; is
D
two fifths; are
What the science teacher does and says ____ of great importance to college students.
#85989
A
was
B
are
C
is
D
were