4. Complete the fact file below with the past simple passive form of the verbs in brackets.

COMPUTERS: a short history

• The first computer (1)__________________ (invent) by Charles Babbage in the early 19th century. It (2)__________________ (not power) by electricity – it was mechanical.
• The first electronic digital computer (3)_________________ (build) in 1943 in Britain. It (4)__________________ (call) ‘Colossus’ and it (5)__________________ (use) for decoding enemy messages in the war.
• Businesses began to use computers in the 1950s, but computers (6)__________________ (not sell) in shops until the early 1970s.
• The first desktop computers (7)__________________ (develop) in the late 1970s.
• Internet access via a modem (8)_________________ (add) in the 1990s, but wireless access (9)__________________ (not add) to most computers until about 2000.
• For the first time, in 2015, more tablets and smartphones (10)__________________ (sell) than laptops and desktops. Will computers eventually disappear from our homes and schools?