A.founding | B.founded | C.found | D.having found |
A.provides | B.provided | C.providing | D.is providing |
A.speaking | B.speak | C.spoken | D.be able to speak |
A.Introducing | B.To introduce | C.To be introduced | D.On being introduced |
A.to be | B.to have been | C.being | D.having been |
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