Three-fourths of the surface of the earth＿＿＿sea．
#86267
A
is
B
are
C
were
D
has been
推荐题目
A series of books in the library ____ been stolen so that the number of them ____ smaller than before.
#85767
A
have, is
B
has, is
C
has, are
D
have, are
The number of people invited ______ fifty, but a number of them ________ absent for different reasons.
#85940
A
was, was
B
were, were
C
were, was
D
was, were
No one in the department but Tom and I ______ that the director is going to resign.
#86294
A
knows
B
know
C
have known
D
am to know