these tips, and your time doing research on the Internet much worthwhile.
A. Following, will spend, is
B. Followed, spent, was
C. Follow, spent, will be
D. To follow, spending, has been
网友回答
A. Following, will spend, is
B. Followed, spent, was
(答案→)C. Follow, spent, will be
D. To follow, spending, has been
解析：考察固定句式和时态。本题考察的是：祈使句+连词+陈述句=If引导的条件句+主句。这个句型进一步转换成：名词短语+连词+陈述句。如果原句中的连词是and,那么可以转换成一个肯定的条件句；如果原句中的连词是or，可以转换成一个否定的祈使句。本题第一空应该使用祈使句；第二空的动词spend与名词time构成逻辑上的被动关系，故使用过去分词作定语修饰名词。后面的主句使用将来时。句意：采纳这些建议，你花在网上做研究的时间就会是值得的。故C正确。