The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries．

A．as

B．what

C．so

D．that

Tom’s mother kept telling him that he should work harder, but ________ didn’t help．

A．he

B．which

C．she

D．it

________ is known to everybody that the moon travels round the earth once every month．

A．That

B．It

C．As

D．What

________ is known to everybody is that the moon travels round the earth once every month．

A．What

B．That

C．As

D．It

________ is known to everybody, the moon travels round the earth once every month．

A．It

B．As

C．Which

D．What

It is believed that not every one can get benefit from the weight loss pills, ________?

A．isn’t it

B．is it

C．don’t they

D．do they

Mrs．Black doesn’t believe her son is able to design a digital camera, ________?

A．is he

B．isn’t he

C．doesn’t she

D．does she

The building over there is a library, ________ is our dormitary．

A．on the east of which

B．to the east of it

C．on the east of that

D．east of which

The number of the visitors, ________ we had expected, was well over 200．

A．that

B．as

C．who

D．where

She had two daughters, ________ became doctors．

A．all of them

B．both of them

C．all of whom

D．both of whom