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第117页

信息发布者：

The plane is used as a training centre (by them).

150 patients were operated on (by Dr Ma) during his last visit.

Some useful advice was given to us (by the teacher) yesterday.

/We were given some useful advice (by the teacher) yesterday.

Local doctors and nurses are invited on board to learn about eye operations (by us).

Many schools are built in poor areas (by the government) every year.

80 per cent of these diseases can be cured (by us).

was held

were talking

opening

was

taken

is known

is/was written

was heard

happens

are handed out in time

was donated to Project Hope

were warned not to go out

was held to raise money for

is often used to send and receive emails

was set up to improve the education quality