A lesson from the terrible drought(干旱) that hit some parts of southwestern China this year is that more anti-drought projects ______ built in the past years.
A.should be
B.should not have been
C.ought to have been
D.must be
答案:C
A lesson from the terrible drought(干旱) that hit some parts of southwestern China this year is that more anti-drought projects ______ built in the past years.
A.should be
B.should not have been
C.ought to have been
D.must be
答案:C