阅读下面短文，从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。

    What is the best way to study? This is a very important question. Some Chinese students often 1 very hard for long hours. This is a 2 habit, but it is not a better way to study. An efficient (高效的) student must 3 enough sleep, enough food and enough rest. Every week you 4 to go out for a walk or visit some friends or some nice places. It's good for your study. When you 5back to your study, you'll find yourself 6 than before and you'll learn more.

    Maybe we can 7that learning English is like taking Chinese medicine. We don't mean that it's 8. We mean that like Chinese medicine, the effect (效果) of your study 9 slowly but surely.

     10 slowly but surely every day and effects will come just like Chinese medicine.

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过15个字。

雾霾中含有大量悬浮颗粒物，①____。主要表现为：悬浮颗粒物进入呼吸道损害肺部，而且通过血液循环破坏身体其它器官。5微米粒径的颗粒物可以进入呼吸道的深部，2微米粒径以下的颗粒物几乎可以全部深入到细支气管和肺泡，并通过血氧交换进入血液中，影响肺、心脏等。因此，②____。另外，随着含有多种致病微生物的悬浮颗粒物吸入增多，有害颗粒物就会伤害肺部，导致人体呼吸系统以至内分泌系统、血液循环系统等患病。从上可知，③____，可能会首先诱发呼吸道疾病，进而导致全身性疾病。