题目内容

Do you know how much time and effort they devoted___________such a complicated project ? 
A．to completeB．completedC．completingD．to completing
D

试题分析：考查固定词组：devote sth to doing花费/投入…做….句意：你知道他们花了多少时间和精力完成这样复杂的过程。选D。
点评：英语中有的词组里的to是介词，不是不定式，如：be accustomed to doing ，get down to doing，be addicted to doing等，要记清楚，并灵活运用。
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