问题
选择题
Be careful about everything for your carelessness will __________our difficulty.
A．add up to
B．add in
C．add up
D．add to
答案
答案：D
考查add短语。Add up to共计达…；add up共计；add to增加。句意：当心一切，因为你的粗心会增加我们的困难。
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