Answer: B) We use 'IN' for months, years, centuries, and long periods of time.
Explanation for this question is being written.
Answer: B) At
Answer: C) In
Answer: B) In
Answer: A) On
Answer: C) It's correct.
Answer: C) Time
Answer: C) Since
Answer: D) At
Answer: B) Incorrect
Answer: C) Preposition
Answer: A) In
Answer: A) Tuesday and Thursday.
Answer: A) Before
Answer: C) After/ in.
Answer: B) For
Answer: D) During
Answer: A) Starting on.
Answer: B) Since
Answer: C) On
Answer: D) Until
Answer: D) Preposition
Answer: A) After
Answer: A) Within
Answer: C) During
Answer: A) During
Answer: C) After
Answer: A) At
Answer: B) By
Answer: A) For
Answer: C) Whithin
Answer: C) Throughout
Answer: B) After
Answer: D) For
Answer: B) Before
Answer: B) Amir always gets up at a quarter past four.
Answer: C) Within
Answer: A) It is nine o'clock.