色彩是一种物理光学现象，有光就有色。我们生活在缤纷的色彩世界，需要不断地了解色彩、恰当地应用色彩，使我们的生活更加丰富多彩。下列说法正确的是()。

George appears______a hard time convincing his employer that he is right over it.

A．having

B．to be having

C．to have

D．having had

A．takes away

B．takes over

C．takes up

D．takes in

It is certain that he will ______ his business to his son when he gets old.

A．take over

B．think over

C．hand over

D．go over

A．for the time being

B．over and over again

C．once upon a time

D．at regular intervals

It is certain that he will ______his business to his son when he gets old.

A．take over

B．think over

C．hand over

D．go over

John _________ his work as soon as he was out of hospital.

A. resumed

B. relieved

C. gripped

D. dealt

A、at

B、to

C、like

D、over

According to the author, one will become obsessive-compulsive______.

A．if he washes his hands every time he touches a surface

B．if he only washes his hands with soap and water

C．if he could not win over the bacteria in his home

D．if he does not fight against the bacteria at home

According to the author, one will become obsessive-compulsive ______.

A．if he washes his hands every time he touches a surface

B．if he only washes his hands with soap and water

C．if he could not win over the bacteria in his home

D．if he does not fight against the bacteria at home

According to the author, one will become obsessive-compulsive ______.

A．if he washes his hands every time he touches a surface

B．if he only washes his hands with soap and water

C．if he could not win over the bacteria in his home

D．if he does not fight against the bacteria at home