Plenty of students continue to be drawn to the intellectual thrill of linguistics field work.
1.is the sentence passive form? 2.does this indicate the future?
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The main verb is "continue" and is active.
However "continue" can take a chain of infinitive phrases
continue [to do something]
and this infinitive part is passive: "to be drawn"
So the sentence is equivalent to a fully active
(Something) continues to draw students to the intellectual thrill...
And it is pretty clear from the context that it is the "something" is the "intellectual thrill" itself.
This is the present tense. It states a present fact, and the tense, with the word "continue" imply that it has been true in the past and is expected to be true into the future, at least for a while.