He finished _____his book last month, and now he is planning _____another one.A.writing; writing B.to write; to writeC.writing; to write D.to write; writing 答案:【答案】C【解析】句意:他上个月写完了他的书,现在他打算再写一本。短语finish doing sth.表示完成做某事; 排除BD;短语plan to do sth.表示计划做某事。排除A。根据题意,故选C。
给出下面四个命题:
①;
②;
③;
④.
其中正确的是________.