用括号内所给词的适当形式填空，每空一词。

1. It is much ________(dry)in Yun Nan province than before because it hasn't rained for a long time.

2. My friend's ________(twelve)birthday is coming. Please help me choose a present for her.

3. Song Zuying sings very well. People like her sweet voice and she is a ________(success) singer.

4. Li Lei and Li Liang are twins, but there are many_________ (different) between them.

5. This is an easy problem. I think you can work it out _________ (easy).

1. _________2. _________3. _________4. _________5. _________

某建筑工地需用3台800千牛·米塔式起重机。总承包单位与一家安装单位签订了安装合同。安装前应办理告知手续。

办理安装告知时，安装单位应提交的个人证书有（）。

A.负责建筑起重机安装专业技术人员资格证书

B.专职安全生产管理人员考核证书

C.安装人员特种作业人员操作证

D.法人证书

E.优秀法人证书