Question

select the appropriate idiom to replace the underlined part of the sentence.
sam seems to have taken up a project that he cannot finished.
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Answer 1

Answer:

some french scientists did an experiment turn into passive voice

Answer 2

"Bite off more than you can chew"

Idioms:

The meaning of the idiom "Bite off more than you can chew" is to take a commitment which one cannot fulfill. Hence, in the given sentence,

Sam seems to have taken up a project that he cannot finished.

The most appropriate idiom to replace the line "taken up a project that he cannot finished", is "Bite off more than you can chew".