This dictionary is very useful．It has ________ many problems about idioms for me．

A．looked up

B．kept up

C．taken up

D．cleared up

You can never imagine what great trouble I have had ________ the patient．

A．treat

B．to treat

C．treating

D．treated

－Where have you been recently?

－I ________ in Nanjing on business for some time last month．

A．have been

B．was

C．had done

D．am

Paul doesn't have to be made ________．He always works hard．

A．learn

B．to learn

C．learning

D．learned

－I don't think I can go any further．

－________．Let's stop here for a rest．

A．I think so

B．I don't think so

C．Neither do I

D．Nor can I

Helen always helps her mother even though going to school ________ most of her day．

A．takes up

B．makes up

C．saves up

D．puts up

It's ten years since the scientist ________ on his life's work of discovering the valuable chemical．

A．made for

B．set out

C．took off

D．turned up

It is said in the book that Thomas Edison(1847～1931)________ the world leading inventor for sixty years．

A．would be

B．has been

C．had been

D．was

The Foreign Minister said,“________ our hope that the two sides will work towards peace．”

A．This is

B．There is

C．That is

D．It is

You can take anything from the shelf and read, but please ________ books when you've finished with them．

A．put on

B．put down

C．put back

D．put off