1 . It was his word and action but not his appearance _______ moved us deeply.

A．as	B．which
C．who	D．that

2 . The question that puzzled them is ____ they can get rid of the air pollution in the area.

A．how is it that

B．that how

C．what is it

D．how it is that

3 . — How long is it ______ you picked up your badminton training?
— It was not until my finance became better in last December ______ I started the training.

A．before; when

B．until; that

C．that; when

D．since; that

4 . ---Who is making so much noise in the garden? --- ___ the children.

A．It is

B．They are

C．That is

D．There are