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Mass deaths of birds were not unheard of, but they normally happened unnoticed at sea or in rural areas away from towns. Many birds are weak and die in winter _______ food is scarce.
#76616
A
which
B
what
C
when
D
how
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The school ______ my sister studies at is far from here.
#76351
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where
B
that
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at which
D
in which
You can only be sure of _____ you have at present; you cannot be sure of something _____ you might get in the future.
#75203
A
that; what 　
B
what; 不填
C
which; that
D
what; which
The girl ________ name was Diana sat next me.
#77124
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who
B
whom
C
whose
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The days _______ we spent together on the farm are not  easy _________.
#77514
A
when, to forget
B
which, to be forgotten
C
that, to forget
D
/, to be forgotten
The owner of the cinema needed to make a lot of improvements and employ more people to keep it running, _______meant spending tens of thousands of pounds．
#78276
A
who
B
that
C
as
D
which