The place _____you are going to visit is the ruin of a place.

A. in which    B. at which   C. where   D.  which

This is one of the means ______the electric energy is conducted from one place to another.

A. by which    B. by that   C. through which  D.  through that

In the dark street, there wasn’t a single person _______she could turn for help.   

A. that   B. who   C. from whom   D.  to whom

She heard a terrible noise, _______brought her heart into her mouth.

A. it   B. which   C. this      D.  that

He paid the boy 10 dollars for washing ten windows, most of ______had not been cleaned for years.   

 A. these   B. those   C. that       D.  which

All___is needed is a supply of oil. 

A. the thing  B. that   C. what   D.  which

The buses, ______were already full, were surrounded by an angry crowd. 

A. most of them    B. most of which     C. which most       D.  that most

___is natural, he married Mary.  

A. It      B. What    C. Which    D.  As

He must be from Africa, ______can be seen from his skin.

A. that    B. as    C. it    D.  what

The reason ______he didn’t come was ____he was injured. 

A. that, because    B. why, that    C. why, because  D.  that, that