Level 48: Choose the word that has the main stress placed differently from that of the others:

Digest /dai’dʤest / (n) summary book

Survive /sə’vaivə/ (v) to survive, to survive

Swallow /’swɔlou/ (n) swallowing

Unnoticed /’ʌn’noutist/ (adj) no one noticed

Answer C, the stress falls on the first syllable, the rest falls on the second syllable