The time ________ we studied together is not easily forgotten．

A．at what

B．when

C．that

D．where

Do you still remember the day ________ we first met?

A．that

B．when

C．what

D．on that

The factory ________ Mr．Li used to work was closed last week．

A．when

B．where

C．that

D．which

Have you visited the house ________ the famous scientist was born?

A．where

B．in that

C．that

D．which

This is the school ________ Mr．Smith once taught．

A．in that

B．when

C．where

D．there

He is the most careful boy ________ I know．

A．what

B．which

C．as

D．/

Don’t go in, this is the shop ________ we have just been ________．

A．/, to

B．that,/

C．where, to

D．which, there

Those ________ made no mistakes in today’s exercises please raise your hands．

A．which

B．whom

C．that

D．who

The boy ________ has two lovely dogs．

A．who live next door

B．which lives next door

C．whom lives next door

D．that lives next door

The man ________ was here just now is a doctor．

A．whom

B．who

C．/

D．he