Answer: A) For
Explanation for this question is being written.
Answer: B) From 8a.m to 6p.m.
Answer: A) In
Answer: C) By
Answer: B) For three years.
Answer: B) From, to.
Answer: B) In
Answer: C) On
Answer: A) During the storm.
Answer: B) At
Answer: A) At
Answer: B) On
Answer: A) SINCE
Answer: C) At half-past six.
Answer: C) For
Answer: B) Since
Answer: C) At
Answer: A) Before
Answer: C) In
Answer: A) In, at, down, inside, to.
Answer: B) ON
Answer: A) On
Answer: C) She has worked at the hospital since two months.
Answer: B) Before
Answer: B) During
Answer: B) Preposition
Answer: A) After
Answer: C) At the.
Answer: A) Over
Answer: B) 20 minutes.
Answer: C) At the age of 21.
Answer: B) For
Answer: C) In the course of.
Answer: A) In / for / of.
Answer: B) 2
Answer: C) Since / for.
Answer: B) False
Answer: A) In/At