WE’D BETTER NOT WASTE WATER_____ WE DON’T HAVE ENOUGH TO DRINK SOO...
21. We’d better not waste water_____ we don’t have enough to drink sooner and later.
a.only if
b.or else
c.as soon as
d. in case
21. We’d better not waste water_____ we don’t have enough to drink sooner and later.
a.only if
b.or else
c.as soon as
d. in case