Cna expansion 2 grammar activity unit 1

See Explanation

Explanation:

Required

Fill in the gap:

To answer this question, you simply write words in bracket, in their past tense forms

The solution is as follows;

Loretta: At the end of the month, He had not eaten any real food for weeks when we found him

Fireman: So ma'am, when did you realize you left the iron on

Yvonne: Oh, it wasn't until I arrived at work that I realized I left it on and that I locked my keys in my car. What a nightmare!

Mom: I only allowed him to go to the park after he finished his homework

answer: b (host)

viruses use the cells of living organisms to reproduce. the cell which is used by virus is called as "host cell". it is a living cell in which virus multiplies, example bacteria, plant or an animal cell.

in this, the virus is a parasite, which uses host cell for its benefit (reproduction) by using the cell machinary of host cell.