Drinking water, which is ______ must for
题型：选择题
问题：
Drinking water, which is ______ must for any human to survive, has to be stored based
on ______ number of people in the household.
[ ]
A. the; a
B. a; the
C. /; the
D. the; the
Drinking water, which is ______ must for any human to survive, has to be stored based
on ______ number of people in the household.
[ ]
A. the; a
B. a; the
C. /; the
D. the; the