题目

When you hear the answer to the question, remember to ___________.A. write down it B. write it down C. write down them D. write them down 答案：【答案】B【解析】句意：当你听到问题的答案时，记得把它写下来。考查动词短语和代词。write down：记下，写下，down是副词，当后面的宾语是代词it或them时，应放在动词write后面，副词down之前（write和down之间）；it：它，指代可数名词单数或不可数名词；them：他们，指代可数名词复数。此代词指代上如图，AD⊥BC于D，DE∥AC，则∠C与∠ADE之和为______度．