A war is so cruel that it always causes great losses, ____ has happened in Iraq and other countries.
#74194
A
what
B
which
C
as
D
one
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We cannot figure out ____quite a number of insects, birds, and animals are dying out.
#74315
A
that
B
as
C
why
D
when
—So when did you meet Joan?—It was last Sunday _______ she came to visit my sister.
#66849
A
that
B
since
C
when
D
Before
—What time will Mr. Brown be back to China? —Sorry. I don’t know______.
#70080
A
when did he go abroad
B
why he is going abroad
C
how soon will he be back
D
how long he will stay abroad
