题目内容
(2007·辽宁)
Help others whenever you can ________ you will make the world a nicer place to live in.
[ ]
A.and
B.or
C.unless
D.but
答案:A
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题目内容
(2007·辽宁)
Help others whenever you can ________ you will make the world a nicer place to live in.
[ ]