Find out the most effective word from the given options to fill in the blanks…

Solution: The correct word to fill both blanks is abashed.

In the first sentence, the girl was laughed at by her classmates; that situation would make her feel embarrassed or ashamed, which is exactly what abashed means.

In the second sentence, criticism from his boss would leave him feeling embarrassed or ashamed as well, so abashed also fits here.

Completed sentences:

The girl was abashed by the laughter of her classmates.

His boss's criticism left him feeling rather abashed.

Meanings of the other options:

• resolute — admirably purposeful, determined, and unwavering; does not mean embarrassed.

• determined — having made a firm decision and being resolved; does not mean ashamed or embarrassed.

• audacious — bold or daring, willing to take risks; not appropriate for describing someone made to feel embarrassed.

Therefore, abashed is the best choice because it directly expresses the feelings evoked by laughter and criticism in the two sentences.