解析　but前后表转折关系，后面应为"但我不一定执行它"，故选C项。

5．Thousands of Haitians cheered as the Chinese medical team arrived，many of _______even cried with joy.

A．those B．them

C．whom D．who

答案　C

解析　whom引导定语从句指代先行词thousands of Haitians，在从句中作of的宾语。

6．You must write down all the information____________ the problem.

A．is related to B．relate to

C．related to D．related

答案　C

解析　此处所填内容应作information的定语，related to作定语，相当于定语从句that is related to...。

7．The careless driver is ________for the traffic accident that_________ yesterday.

A．to blame；happened

B．to blame；was happened

C．to be blamed；was happened

D．to be blamed；happened

答案　A

解析　be to blame应受责备，主动形式表示被动意义；happen是不及物动词，无被动语态。

8．Ms. Claire is a strict but kind teacher，_________ I respect and appreciate most.

A．that B．what

C．one D．which

答案　C

解析　one作a strict but kind teacher的同位语，I respect and appreciate most作one的定语，其前省略了关系词。

9．_________I met him，he was working as a secretary in a big company.