Answer:
Answer and read what, there is nothing else here.
Explanation:
Answer:
The second one: You are, if I'm not mistaken, a good person for this experiment.
Explanation:
The first sentence, "You are, if I'm not mistaken a good person, for this experiment." does not have a comma after "mistaken", where there should be one. After "a good person", there should not be a comma.
Answer: A
The past perfect progressive emphasizes the duration of a past action before another action happened. For example, “I had been smoking for 10 years before I quit.” You form the past perfect progressive by using had been followed by an –ing verb.