5×6÷3=____             24+25-12=____        0÷20+5=____

(100-15)÷5=____      (80+40)÷24=____    350+450=____

56+89=____              42-42÷6=____         621×0+17=____

﹣$\frac{1}{2}$的倒数是____ 

A: Hello, sir, may I talk with you in English?
B: Of course.
A: I have learned English at school for one year. I have very few chances to talk with the English-speaking people.____ 
B: Oh, you speak English very well.
A: Thank you. By the way, ____ 
B: No, I’m not. ____ 
A: How long have you been in this city?
B: ____ 
A: I see. Do you like this city?
B:Yes. I like it very much. It’s a beautiful city.
A: Thank you.____ 

我国某地有一口井，每年只有1天有阳光直射井底的现象，该地的纬度和该天日期搭配正确的是（  ）