Answer:
1. I cannot remember well, but I am sure I <em>have been</em> here for more than ten years.
The past participle of be is been.
2. Sitara was only three months old when her parents <em>relocated</em> to New York.
The past participle of relocate is relocated.
3. By the time they decided to return to India, she <em>became</em> old enough to make her own decisions.
The past tense of become is became.
The conjunction that bestfits the run-on sentence is
d. and
Here the answer
Every sitcom episode has a main plot (story A), as well as one or two subplots (stories B and C).” There are three main acts, divided by two commercial breaks (in most American TV), with 3-5 scenes per act.
