1.Information technology...(change) over the past years due to user expectations.
2....(you/still plant) the trees if I join you at 3.30 this evening
3.If we ... (have) flying vehicles now,we could solve the problem of traffic jam
4.John J.Stone Parker ....(parent) his invention when he was 4 years old
5.The computer mouse....(invent) by Douglas Engelbart in 1964
6. They said that they.... (not be) to the art gallery for a long time.
7. I strongly believe there in 10 years' time... (be) huge changes in the way we live
8.The planet Mars ...(explore) remotely by spacecraft since the late 20th century.
9.The teacher told us that we ...(may) choose any subject that we ...(like) best.
10.When I called Jane at 4 o'clock yesterday evening, she said she (work) then.
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