Mary will visit Kyoto, and John will too.
Mary will visit Kyoto, and John will do too.
Mary will be a good doctor, and John will be too.
Nananara Mary will visit Kyoto, and John will too. Mary will visit Kyoto, and John will do too. Mary will be a good doctor, and John will be too.
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NananaraMary will visit Kyoto, and John will too.
Mary will visit Kyoto, and John will do too.
Mary will be a good doctor, and John will be too.
All OK. The middle one is British. In American English we don't use the auxiliary do in that way.
CJ