✓1 Complete the text about the history of tractors. Put the
verbs in brackets in the correct tense, Past Simple or
Present Perfect Simple, active or passive.
Tractors.
used
' (use) on farms since the
start of the twentieth century. The first mechanical
implements.
2 (draw) by horse.
Around 1920, petrol-engined tractors
3
_' (begin) to replace the horse. These
(pull) implements
early tractors.
from a drawbar. Around 1940, tractors
5 (begin) to use a hydraulic lift
system. In addition, it
(be) possible
for farmers to use a power take-off shaft for trailed
implements, such as manure spreaders. Since the
early 1950s, there.
' (be) many
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