Answer: C) At
Explanation for this question is being written.
Answer: A) IN
Answer: B) In
Answer: B) False
Answer: A) Duration of an event.
Answer: A) In
Answer: A) From
Answer: A) In / in.
Answer: C) In
Answer: C) In the morning on Monday.
Answer: B) At
Answer: B) ON
Answer: B) 6:30
Answer: A) At
Answer: B) Within
Answer: A) On
Answer: B) On
Answer: B) From
Answer: D) D
Answer: D) At
Answer: C) On
Answer: D) It's quarter to nine.
Answer: B) Since
Answer: B) Until
Answer: D) Since
Answer: D) On
Answer: A) For
Answer: C) Until
Answer: D) ON / AT.
Answer: A) Till
Answer: A) On-at
Answer: B) In, on, in.