一道英语语法题（宾语从句）

1.There is a new problem involved in the popularity of private cars________Elizabeth I of England liked nothing more than being surrounded by clever and qualified noblemen at court.
A.that, to be improved
B.which,to be improved
C.where,improving
D.when,improving
请解释一下选择答案的原因，说明理由。THANKS!
1.There is a new problem involved in the popularity of private cars________road conditions need________.
A.that, to be improved
B.which,to be improved
C.where,improving
D.when,improving
请解释一下选择答案的原因，说明理由。THANKS!

一道英语语法题（宾语从句） 关于宾语从句的一道题 一道宾语从句题目 英语语法 什么叫宾语从句的及物动词 宾语从句的题 宾语从句一题 英语语法（定于从句） 英语语法中，关于定语、宾语、表语、状语、宾补还有定语从句、宾语从句、复合句等 一道英语选择题_宾语从句 一道宾语从句选择题，我很混乱！