A cat, ______ it is a white one ______ a black one, is considered to be a good cat as long as it can catch mice. 
#55577
A
both; and
B
not only; but also
C
either; or
D
whether; or
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 In a nature reserve , it’s ___ to hunt ______ fish there . 
#55961
A
important , and
B
unable , but
C
incorrect , or
D
correct , or
It’s a lovely day today!  ______ go out for a walk?
#56989
A
Why don’t
B
Why not you
C
Why not
D
Why
Mr. Zhou was really anxious _____he can’t find his car. 
#55718
A
while
B
because
C
though
D
until