根据下面一段对话内容，从下面选项中选出能填入空白处的最佳选项，其中两项为多余选项。 A: Oh, hi, Tess! I’m sorry. I’m thinking about something. B. （16）A. I am. I have a chance to go onatour. B. A tour What kind of tour A: A music tour. （17）B: Wow! That’ s great. They are pretty famous. A: （18）B: So you’re going to do it A: I don’t know. （19）B: It sure would! Where will the tour go A: （20）B: How long is the tour A: Four months. B: OK, wish you a happy travel! A: Thank you!

该处选项为（）。

单项选择题A: Thank you for looking after the cat for me.B.().I love cats.

A. Thank you
B. It’s my pleasure
C. By the way
D. No, of course not
E. Never mind

单项选择题正三棱锥A—BCD的体积为（ ）．

单项选择题A．<br ><img src= {$uploaddir} ea1b4302-f3df-4a9c-8d3b-6cf2ac87f52e.jpg >B．<br ><img src= {$uploaddir} 601c8ddf-c709-438a-b1ed-de2421d118c7.jpg >C．8D．12

单项选择题已知集合A={x|5x-a≤0}，B={x|6x-b＞0}，a∈N，b∈N(其中N为自然数集)，且满足(A∩B.∩N={2，3，4}，则整数对(a，b)的个数为（ ）．

单项选择题该处选项为（）。

A．This tour is the chance of lifetime．
B．It goes all over North America and South America．
C．It looks like you’re dreaming about something．
D．You’ll have to quit school and your job at the store．
E．My agent wants me to go on a tour with Art’s Jazz Band．
F．Have you told anyone about this yet
G．It would be a great opportunity!