Evidence has been found through years of study _____ children’s early sleeping problems are likely to continue when they grow up.
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A
why
B
how
C
that
D
whether
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______ students should be given more free time is suggested by many experts and welcomed by kids in school．
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A
What
B
Why
C
Whether
D
That
The scientist, __________ my father works, is about 50.
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A
on whom
B
to which
C
with which
D
with whom
Recently I bought an ancient Chinese vase, _______ was very reasonable.
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A
which price
B
the price of which
C
its price
D
the price of whose