Our maths teacher set so difficult an examination problem ______ none of us worked out.
#76873
A
which
B
that
C
as
D
so that
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My daughter, job requires her to do a lot of travelling, is always away from home.
#75432
A
which
B
that
C
whose
D
where
Something must be done now to change the situation _______ top students dominate everything in our English learning class.
#75812
A
when
B
that
C
where
D
which
The US is a large country ________ many different dialects are spoken.
#75959
A
what
B
when
C
where
D
which