Answer: A) On the air.
Explanation for this question is being written.
Answer: B) From to.
Answer: C) On
Answer: D) At-on
Answer: B) Since
Answer: B) False
Answer: A) On
Answer: D) On
Answer: C) Night
Answer: D) At
Answer: A) In
Answer: A) By
Answer: D) By, until.
Answer: C) By
Answer: B) On
Answer: A) At
Answer: C) At
Answer: B) In
Answer: D) In
Answer: A) Since
Answer: D) (at), (on).
Answer: B) At
Answer: C) For
Answer: C) In
Answer: B) Through
Answer: A) Until
Answer: C) By, on.
Answer: B) From
Answer: C) We visit family at Christmas, and we open presents on Christmas Day.
Answer: C) Before