18. A.Writers of his time had no means to protect their works.
B.Possible sources of clues about him were lost in a fire.
C.His works were adapted beyond recognition.
D.People of his time had little interest in him.
12. A.Walt for Mr.Grand to call back.
B.Leave a message for Mr.Grand.
C.Provide details of their products and services.
D.Send a comprehensive description of their work.
7.A.Go to work on foot.
B.Take a sightseeing trip.
C.Start work earlier than usual.
D.Take a walk when the weather is nice.