Answer:
detect
Explanation:
detect whether bad people are coming...hope i helped
When the Principal entered the class, a student on the blackboard.
<u>Explanation</u>:-
The given sentence is in past continuous tense.
The past continuous tense, also referred to as the past progressive tense, is used to express actions at a particular moment in the past. The action started before that moment but has not finished at that moment.
It is composed of two parts : the past tense of the verb "to be" (was/were), and the base of the main verb "+ing".
The verb is called and the verb phrase is called her
1. All living things are made of one or more cells.
2. The cell is the basic unit of life in which the activities of life occur.
<span>3. All cells come from cells that already exist.</span>