The mother didn’t know _____to blame for the broken glass as it happened while she was out.
#64777
A
who
B
which
C
they
D
that
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—I don't imagine Russ and his poor dog had a good time on the deserted island，________？—I have no idea.
#64455
A
didn't they
B
do you
C
did they
D
hadn't they
Is the backpack on the desk? _____________.
#60344
A
No, it is.
B
Yes, it isn’t.
C
Yes, it is.
D
No, it’s no.