285.Ten years ago the population of our village was ______ that of theirs.
A.as twice large as
B.twice as large as
C.twice as much as
D.as twice much as
286.A survey of the opinions of experts _________ that three hours of outdoor exercise a week ______ good for one's health.
A.show;are
B.shows;is
C.show;is
D.shows;are