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Knowing how long the test would last, the students who finished ________ back and waited until the end of the exam.

A. settle              B. settled               C. settling          D. to settle

Knowing how long the test would last, the students who finished ____ back and waited until the end of the exam.

A. settle     B. settled    C. settling    D. to settle

Knowing how long the test would last, the students who finished ____ back and waited until the end of the exam.

A. settle     B. settled    C. settling    D. to settle

 Knowing how long the test would last, the students who finished ____ back and waited until the end of the exam.

A. settle     B. settled    C. settling    D. to settle

Knowing how long the test would last, the students who finished _______ back and waited until the end of the exam.

    A. settle   B. settled  C. settling D. to settle