He is believed to be one of the best _____composers. Although old, he is very much ____ and he can give a ______description of what happened.

ll be off on business next month Ifyou write letters and E-mails to me, please _____ all the mails to Mr Zhang

So many years have passed and the terrifying accidentis still ______in her mind.

DNA is very useful for us, it many years ago.

Using many symbols makes to put much information on a single map.