We know that about seventy percent _____ the earth _____ covered by water.
#44426
A
/; is
B
of; are
C
of; is
D
about; are
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--Who _______ the Harry Potter series________ ?     -- J.K.Rowling.
#44425
A
did, be written
B
was, written
C
was, written by
D
did, be written by
Stamps ______ sending letters.
#45020
A
used to
B
are used to
C
are used for
D
are using
They all think the problem needn’t _________. It isn’t worth _________ at all.
#44698
A
discussing; discussing
B
to be discussed; discussing
C
be discussed; discussing
D
to be discussed; being discussed
It is reported that more schools        in Nanjing next year.
#44666
A
will be built
B
were built
C
have built
D
will build