题目内容

Think it over, _____ you’ll work out the math problem.
A．orB．soC．forD．and
D
or或者，否则；so因此；for 为了，对于；and和，并且。句意：仔细思考一下，你就会计算出这道数学题，结合语境可知上下文是顺接关系，故选D。
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