The factory ______ I am going to is the place ______ my mother used to work many years ago
A where, where           B where, which   C which, where          D that, which

The Summer Palace is one of the most beautiful parks ______ built in the Qing Dynasty.
A where were B where was 　 　 　 C that were 　 　 　 D which was

The last river ______ they crossed is two miles wide.
A where　B which C that D in which

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 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