Select the correct active form of the given sentence. The main gate of the building was being guarded by gun-totting guards. (a) Gun-totting guards guarded the main gate of the building. (b) The main gate of the building were guarding gun-totting guards. (c) Gun-totting guards were guarding the main gate of the building. (d) Gun-totting guards were guarding the main gate of the building.

Options

A. Gun-totting guards guarded the main gate of the building.
B. The main gate of the building were guarding gun-totting guards.
C. Gun-totting guards were guarding the main gate of the building.
D. Gun-totting guards were guarding the main gate of the building.

Explanation

(c) Gun-toting guards were guarding t he main gate of the building. (Correct) (a) Gun-toting g uards guarded the main gate of the building. (Tense has changed) (b) The main gate of the building were guarding gun-toting guards. (Incorrect Subject and Structure) (d) Gun-toting guards h ave been guarding the main g ate of the building. (Tense has changed)