Use the correct tense or form of the verbs in parentheses

1, This letter needs ........... immediately. Will you take of it ? ( send )

2, \(It^,s\)a difficult question. I wish i ...... the answer (know)

3, Would you mind ........ the door ? ( close )

4, \(It^,s\)an exciting. I see ........ It twice already ( see )