张三收到了客户李四发来的含数字签名的电子邮件,他不能通过验证数字签名来确认的信息有(51)。
A.邮件在传送过程中是否加密
B.邮件是否被窜改
C.邮件是否被假冒
D.邮件的发送者是否是李四
第1题
—Can you come here next Friday?
—Sorry, I ______ .
A.can't B.mustn't C.needn't D.may not
第2题
I'm sorry I will not be free then. ______
A.That's nodding
B.It's very kind of you
C.I'd love to
第3题
A.Would you like
B.What about
C.Why don’t you
第4题
A、I'm sorry you had a bad experience.
B、I'm sorry you are a bad experience.
C、I'm sorry you bad experience.
D、I'm sorry I made a mistake.
第5题
Sorry,I'm not free this evening.()dinner with Mike.
A、I will have
B、I'm having
C、I have
第6题
Xiaoyan:So, I' d like to come and see the flat.
Franca: Yes, when is convenient? How about during the day? I usually work in the
evening.
Xiaoyan; Well,I work during the day, but perhaps in the afternoon?
Franca:Well, why don't you come at about 5 o'clock?
Xiaoyan:That's a good idea.
Franca; Are you free on Thursday?
Xiaoyan: No, I'm afraid I'm not. We always have a meeting on Thursday. What about
Wednesday?
Franca:No, I' m sorry. I' m busy on Wednesday. I’m in Cambridge. Are you free on
Friday?
Xaaoyan:Yes,Friday is fine.
Franca: Okay. See you on Friday at 5 o'clock at the flat.
Xiaoyan;Thanks very much. Goodbye.
Franca:Goodbye.
1. Franca usually works during the day.
A. Right
B. Wrong
2. It is convenient for both of them to meet in the afternoon.
A. Right
B. Wrong
3.Xiaoyan is free on Wednesday.
A. Right
B. Wrong
4. Franca is not free on Wednesday because he has a meeting.
A. Right
B. Wrong
5. They are going to meet on Friday at the flat.
A. Right
B. Wrong
第7题
- Will you be able to come to the meeting? _____________
A、I’m afraid not
B、I’m sorry not
C、I’m not afraid so
D、I’m sorry that “no”
第8题
A、See you tomorrow.
B、Ok, it doesn't matter.
C、Sorry, all our rooms are booked.
D、Here is the room key.
第9题
Franca: Yes, when is convenient? How about during the day? I usually work in the
evening.
Xiaoyan; Well,I work during the day, but perhaps in the afternoon?
Franca:Well, why don't you come at about 5 o'clock?
Xiaoyan:That's a good idea.
Franca; Are you free on Thursday?
Xiaoyan: No, I'm afraid I'm not. We always have a meeting on Thursday. What about
Wednesday?
Franca:No, I' m sorry. I' m busy on Wednesday. I’m in Cambridge. Are you free on
Friday?
Xaaoyan:Yes,Friday is fine.
Franca: Okay. See you on Friday at 5 o'clock at the flat.
Xiaoyan;Thanks very much. Goodbye.
Franca:Goodbye.
1. Franca usually works during the day.
A. Right
B. Wrong
2. It is convenient for both of them to meet in the afternoon.
A. Right
B. Wrong
3.Xiaoyan is free on Wednesday.
A. Right
B. Wrong
4. Franca is not free on Wednesday because he has a meeting.
A. Right
B. Wrong
5. They are going to meet on Friday at the flat.
A. Right
B. Wrong
第10题
I'm very sorry I'm late. I ______ and told you I was coming.
A.ought to phone you
B.must phone you
C.ought to have phoned you
D.must have phoned you
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