( 2 ) Refer the sentences to the appropriate tense forms In Passive.
A Present Simple
B Past Simple
c Present Perfect
D Past Perfect
1 His contrbution has not been duly appreciatod up to present days.
2 His name is associated with invisible rays.
13 The results were published in scientific papers of the Vienna
Academy obsciences.
0 4 100 pages had been published on the subject of cathode lamps and
invisible rays.​

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