根据下列句子的意思及所给的汉语提示，写出空缺处单词的正确形式（每空一词）。

1. I have _________(写) several invitations for my birthday.

2. How long did it ________(花费) you to do your homework last night.

3. Hi! You have spent ____       (1个半小时) in writing the letter!

4. He is sometimes late because he lives ________(最远) from the school.

5. I have never __________(听说) her, but she is one of my aunts.

施工单项合同估算价在( )人民币以上的工程建设项目，必须进行招标。

A．200万元

B．300万元

C．400万元

D．500万元