题目内容：

根据中文及句意，完成句子。

1.Who do you think is the greatest person __________(活着的)?

2. I saw Jim run away in the __________(方向) of the post office.

3.He ________(意识到) the importance of study and asked his teacher for some help.

4. --Have you ever been _________(国外) for holiday? –Never.

5.--When did they ________(返回) home from Japan? –Last Saturday.