Direction: Select the option that is the (Active/passive) form of the given sentence.
One of the passengers was being thoroughly checked by the custom officers.

Options

A. The custom officers have been thoroughly checking one of the passengers
B. The custom officers thoroughly checked one of the passengers.
C. One of the passengers was thoroughly checking the custom officers.
D. The custom officers were thoroughly checking one of the passengers.

Explanation

(d)The custom officers were thoroughly checking one of the passengers. (Correct) (a) The custom officers have been thoroughly checking one of the passengers. (Tense has changed) (b) The custom officers thoroughly checked one of the passengers. (Tense has changed) (c) One of the passengers was thoroughly checking the custom officers. (Meaning has changed)