—Look! It _____ be Jane on the playground.

—It _____ be her because I saw her enter the dance room just now. [ ]

A. must; mustn't

B. can; can't

C. may; mustn't

D. must; can't

评标首先对投标文件进行初评，主要是审查（）

A.投标文件是否完整，是否符合招标文件的要求

B.投标文件有无计算错误

C.投标商的技术、经济和报价

D.是否提交了足够的保证金