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【单选题】
设无G(如下图所示),则其最小生成树上所有边的之和为( )。A.
7
B.
8
C.
10
D.
11
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反馈参考答案：
举一反三
【简答题】I'm sorry about that. I'll see to it at once. Can I , please?
【单选题】I'm sorry. I go now. My father told me on the phone that my mother was ill.
A.
can
B.
may
C.
have to
D.
need
【单选题】Talia: I'm sorry. I know this will take some time, but I really think that you should rewrite this story.
A.
Alex: (Yeah, you may be right.)It isn't really very good.
B.
I see your point, I guess.
C.
Big deal!
【单选题】—I'm so sorry that I have broken your computer. 一 ________. I can mend it by myself. [ ]
A.
Never mind
B.
It's not good for you
C.
Bad luck
D.
OK
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