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He wondered if he could slip out of the lecture hall without anyone______.

A. noticing   B. noticed   C. to notice  D. being noticed

He wondered if he could slip out of the lecture hall without anyone______.

A. noticing   B. noticed   C. to notice  D. being noticed

He wondered if he could slip out of the lecture hall without anyone _____.

A. noticing   B. noticed   C. to notice   D. being noticed             

He wondered if he could slip out of the lecture hall without anyone        .

   A. noticing      B. noticed      C. to notice    D. being noticed

He wondered if he could slip out of the lecture hall without anyone        .

   A. noticing                      B. noticed                    C. to notice                      D. being noticed