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66d Re-write the sentences. Use the passive.

0 For a long time, they recorded music on vinyl records.
For a long time, music was recorded on vinyl records.
1 Nowadays, they release albums on CDs.
Nowadays, aIbums ......................................................
2 They developed the CD in the 1980s.
The CD .....................................................................
3 People use CDs to store music or computer software.
CDs .................................................................
4 They make CDs from plastic and aluminium.
CDs ...........................................................
5 They have sold billions of CDs in the last twenty years.
Billions of CDs .......................................................
6 Maybe one day people will download all music from the Internet.
Maybe one day all music .......................................................
7 But probably people will buy CDs for a few years to come.
But probably CDs ......................................................................

67 The passive + by

67 a Re-write the sentences. Use the passive and by + agent if necessary.

0 George Lucas made Star Wars. Star Wars was made by George Lucas.
1 They speak three languages in Switzerland. ....................................................................
2 Thieves once stole the FIFA World Cup. ....................................................................
3 Alexander Fleming discovered penicillin. ....................................................................
4 About 1,500 people have climbed Everest. ....................................................................
5 They award the Nobel Peace Prize every year. ....................................................................
6 They have discovered water on Mars. ............................................

1 Nowadays, albums are released on CDs.2 The CD was developed in the 1980s.3 CDs are used to store music or computer software.4 CDs are made from plastic and aluminum.5 Billions of CDs have been sold in the last twenty years.6 Maybe one day all music will be downloaded from the Internet.7 But probably CDs will be bought for a few years to come.671 Three languages are spoken by them in Switzerland. 2 The FIFA World Cup was once stolen by thieves. 3 Penicillin was discovered by Alexander Fleming. 4 Everest has been climbed by about 1,500 people. 5 The Nobel Peace Prize is awarded by them every year. 6 Water on Mars has been discovered by them.