Friendship is a two-sided ________; it lives by give-and-take.

A. to work                

B. working           

C. being working    

D. to be work

A. having             

B. having had          

C. to have            

D. for having

A. had installed      

B. had been installed

C. had been installing

D. installed

A. activity      

B. happy              

D. birthday

A. She started cooking for dinner two hours ago.

B. Cooking for dinner took her two hours.

C. She didn’t start cooking for dinner until it was two.

D. She has two hours to cook for dinner.

A. Because he is old, he can run far.       

B. He is too old to run so far

C. He is old enough to run far.                       

D. Although he is old, he can run far.