I find these problems are easy ________.

A．to work out

B．to be worked out

C．to work them out

D．to be worked them out

This has made it necessary for industry ________ very quickly.

A．developing

B．to develop

C．to have developed

D．developed

Mr. Smith is the very doctor for you ________.

A．to be sent for

B．sending for

C．sent for

D．to send for

Peter drove too fast, (　　 ) was dangerous.

A. which 

B. that 

C. it 

D. all

His house, (    ) he paid 10 thousand dollars, was burnt.

A. that  

B. which 

C. for which 

D. for that

These are the photos (    ) we took..

A. where 

B. which 

C. who  

D. all

I have got something (   ) might interest you.

A. X  

B. which 

C. whom 

D. that

The man (   ) stole your car was arrested.

A.  X 

B. whom  

C. which  

D. who

We will never forget the days (    ) we spent in the country.

A. when 

B. all   

C that.  

D. in which

I’ll go back to the town (    )I grew up this coming vacation.

A. that   

B. which  

C. where  

D. from where