1 . The old woman has 2 dogs and 3 cats, ________ play with her happily, ________ makes her very satisfied.

A．and all of them; that	B．all of them; which
C．and all of which; that	D．all of which; which

2 . ______ is known to us all, things can easily go wrong when people are under ______.

A．Which; control

B．As; load

C．It; strength

D．As; stress

4 . This is the small house less than 15 square meters, under _______ roof lives a large family of three generations.

A．which	B．whose
C．as	D．that

5 . John invited about 40 people to his wedding, most of 　　　 are family members.

A．them	B．that
C．which	D．whom

6 . The Science Museum, ________ we visited during a recent trip to Britain, is one of London’s tourist attractions.

A．which

B．what

C．that

D．where