【解析】本题考查形容词后的不定式用法．形容词后接动词常常用不定式，且主动表被动，无需用被动语态．be+adj．+ to do sth．difficult是形容词，意为困难的，realize是动词，意为实现．故选：D．

6．Lucy rushed to the school, only_____ that it was Saturday．（　　）

A．finding B．found

C．to find D．having found

【答案】C

【解析】本题考查了非谓语动词中only+不定式的用法．only+不定式表示意料之外的事情．Lucy匆忙赶到学校，和后半句"这是周六"与预想的结果恰恰相反，因此是意料之外的是．所以用不定式．故选：C．

7．Difficult as rumours on social media are _______, the government will step up supervision （监管）so that people will not be easily misled．（　　）

A．preventing B．to be prevented

C．to prevent D．being prevented

【答案】C

【解析】考查动词不定式．此处是由as引导的让步状语从句，表示"尽管"之意．在这种情况下，as引导的从句可以倒装，倒装时形容词可以提前．原句是"as rumours on social media are difficult _____"， 又因为"be+形容词+ to do"结构，意为"做某事...（难、容易等）"，用不定式to do主动表被动．故正确答案为C．本题易错项为D．错误原因可能是考生对于as引导让步状语从句的倒装用法不熟，导致错选．故选：C．

8．﹣Where should I send my application？

﹣The Personnel Office is the place ．（　　）

A．to send it B．sent it to

C．to send it to D．for sending it

【答案】C

【解析】考查动词不定式．动词不定式在句中作后置定语，send sth．to sp．意为"送某物到某地方"，是固定用法，to不可省略．C项正确．故选：C．

9．No offence, but I want to say that the driver is not the one for the accident．（　　）

A．to be blamed B．blamed

C．blaming D．to blame

【答案】D