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.
21.A.Contact your agent.
B.Get a lift if possible.
C.Use official transport.
D.Have a friend meet you.
3.A.His handwriting has a unique style.
B.His notes are not easy to read.
C.He did not attend today's class.
D.He is very pleased to be able to help.
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.
