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
推荐题目
The case is rare ______ a man can be cured of such a terrible disease.
#78178
A
when
B
where
C
how
D
that
China’s population is expected to increase to about 1.5 billion, ____ it will start to decline slowly.
#76400
A
after that
B
since when
C
on which
D
after which
.In the dark street, there wasn’t a single person, _______ she could turn for help.
#75645
A
that
B
who
C
fromwhom
D
towhom
After the flooding, people were suffering in that area, _______urgently needed clean water, medicine and shelter to survive.
#78006
A
which
B
who
C
where
D
what
The library from __________we borrow books will be rebuilt next year.
#77707
A
that
B
which
C
where
D
whom