It is selfless ________ the doctor to devote all the time he had ________ for the patients.

A. for; to care            B. of; to care              C. for; to caring          D. of; to caring

 It is important          people         learn team spirit.

     A. of; of           B. of; to        C. for, to        D. to; to

It’s time _____ class. You must _____ the classroom.

It was silly ____ you to give up ____ things that we all wanted.

A. for, to do                    B. for, doing                  C. of, to do           D. of, doing

It is important        us      some good books.