LIB 3 ** Complete the sentences with the 3 correct active or passive form of the verbs in brackets. 1 Experts predict that in the future, electricity will be used (use) to power most cars. 2 The earliest form of rail transport (invented) over 2,000 years ago. However, the . first time that trains (use) to travel between cities wasn't until 1830. 3 More people (use) cars than ferries and large ships. However, more pollution (create) by one large ship than a million cars. 4 Centuries ago, people (not use) machines to travel around. They (use) animals instead. 5 In the future, short trips (taken) into space. Rockets which can carry people into space more quickly and cheaply (invent). 6 The first flight across the Atlantic (make) in 1927. Now, around 3,000 planes (travel) across the Atlantic every day.

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