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更多“______Alice's brother.”相关的问题
通读下面的短文，回答题。
提示：爱丽丝的妈妈病了，爱丽丝想向老师格林先生请几天假。
Alice : Excuse me， Mr． Green． I" d like to take a few days off．
Green : 51 ？
Alice:My mother is ill． I have to take care of her．
Green:Oh dear! I am sorry to hear that． 52 ？
Alice:No，thank you． My mother has caught a bad cold． She has a high fever and coughs dayand night． The doctor says my mother has to be in hospital for a few days． I would like tobe with her．
Green : I understand． 53 ？
Alice:I hope to be back next Wednesday．
Green : That" s all right． 54
Alice:Thank you， Mr． Green． That" s very kind of you． I will write it immediately．Green : 55
第51题 ________
查看材料
A.Alice的公钥
B.Alice的私钥
C.Sue的公钥
D.Sue的私钥
A.marrying
B.marriage
C.married
D.to marry
A.dist(name=‘alice’)
B.dist(name=‘alice’,age=42)
C.False
D.True
A.that
B.when
C.which
D.where
A.Alice的公钥
B.Alice的私钥
C.Bob的公钥
D.Bob的私钥
A.Bob的安全级是(机密，{NUC，EUR})，文件的安全级是(机密，{NUC，EUR，AMC})，Bob请求写该文件
B.Bob的安全级是(机密，{NUC，EUR})，文件的安全级是(机密，{NUC})，Bob请求读该文件
C.Alice的安全级是(机密，{NUC，EUR})，文件的安全级是(机密，{NUC，US})，Alice请求写该文件
D.Alice的安全级是(机密，{NUC，US})，文件的安全级是(机密，{NUC，US})，Alice请求读该文件
A.have been
B.have gone
C.has been
D.hasn’t gone
