1 . The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent _______ cause a series of explosions of the nuclear reactors in several power stations.

A．to

B．that

C．as to

D．as that

2 . She didn’t allow the accident to discourage her. On the contrary, she began to work        .

A．as twice hard	B．twice as hard
C．twice as harder	D．harder twice

3 . Losing weight may not be just about what you eat when you eat it, according to a new study．

A．so

B．and

C．but

D．for

4 . Children under sixteen are not permitted to participate in such kind of activities _____ bad for their mental development.

A．as is

B．as are

C．that are

D．that they are