题目内容

在运算过程中，能够使空表与非空表的运算统一的结构足______。

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What does the woman mean What does the woman mean

A. She wants to know how the man found the hotel.
B. She wants to know how the man likes the hotel,
C. She thinks the hotel is not very good.

A lot of people don’t want to talk about their age, especially(尤其是) women Over 30. The thought of growing older is a painful(痛苦的) one and most of us, if possible, would like to have nothing to do with it. However, getting older is a thing that happens to all of us. As a result, many people work hard to keep young. So the last thing they want is for someone to ask the question, "How old are you" People may answer this question like:"How old do you think I am 30 something. I’m in my thirties. Let’s just leave it at that. " "I can’t remember. " "Oh, don’t ask me that. " "A lot older than what I would like to he. " However, if you really want to Know someone’s age, this is how you could find out the answer. First you estimate(估计) their age. Then you subtract(减去) ten years from that estimation. Certainly you will get a big smile from that person who will also say, "Wow. You are my best friend. I’m 38 already. Can you believe it" You, of course, say, "No. I really can’t. You’re jolting. You don’t look a day over 28. \ It’s impossible for you to Know a stxanger’s age.

A. Right.
B．Wrong.
C．Doesn’t Say.

I ______ go there this morning, so I stayed at home.

A. didn’t need to
B．didn’t need
C．needn’t to

What time is it now What time is it now

A. It’s eight o’clock.
B. It’s eight twenty,
C. It’s seven forty.