They greet me cheerfully every morning.

The correct answer is: B. I am greeted cheerfully by them every morning.

The sentence “They greet me cheerfully every morning” is in the simple present tense. This means that the action of greeting is happening regularly or repeatedly. The subject of the sentence is “they”, and the direct object is “me”. The verb “greet” is in the third person plural form, which means that it is being used to describe the action of more than one person.

The sentence can be paraphrased as follows:

• More than one person greets me cheerfully every morning.
• I am greeted cheerfully by more than one person every morning.
• I receive cheerful greetings from more than one person every morning.

The other options are incorrect because they do not accurately reflect the meaning of the original sentence.

• Option A, “Every morning I was greeted cheerfully”, is in the simple past tense. This means that the action of greeting happened once or a limited number of times in the past.
• Option C, “I am being greeted cheerfully by them every morning”, is in the present progressive tense. This means that the action of greeting is happening now.
• Option D, “Cheerful greeting is done by them every morning to me”, is in the passive voice. This means that the focus of the sentence is on the action of greeting, rather than on the person who is doing the greeting.