1. We moved here the year that my mother died.
2 the watch that you gave me keeps perfect time.
지시대명시?
3. Its possible that he has not received the letter.
가주어진주어?
무슨that인지 구별법좀 알려주세요.

그리고 4번 독해랑 이설명이 뜻하는 단어는 뭔지 알려주세요~
4.to let somone come out of a plice where they have been kept.