—When did your brother begin to show his interest in medicine.—It was a Saturday _____ he noticed his classmate experimenting on a frog in the lab.
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A
that
B
what
C
when
D
which
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Nature is at its most beautiful in spring ______ all kinds of flowers are in blossom, ______ attracts people from all walks of life to take a spring outing.
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A
that; which
B
which; where
C
when; that
D
when; which
More public kindergartens preschool kids can spend their fun-filled childhood will be built this year.
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A
to which
B
with whom
C
in which
D
from where
The company the girl used to work ________ was shut down last month.
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A
for that
B
for
C
for whom
D
/
They ask about the things and teachers ______ they still remembered in the school.
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A
which
B
that
C
whom
D
who