Make up sentences using the words and phrases given.

1. becoming/is/the/better/traffic.

->

2. life/in/is/better/the/changing/country.

->

3. I/countryside/the/last Sunday/went/my uncle/to/and.

->

4. is/home/so/dark/should/It/we/go/getting->

1. A. nature B. migrant C. facility D.away

2. A. accessible B. pressure C. illness D. success

The normal working day in Britain is ____ 9 a.m to 5 p.m, so most offices are open 9-5. Schools usually start at 9 o'clock, too, but they _____ at about 3.30. Shops usually ____ from 9 to 5.30 Monday to Saturday and ____ shops open from 10 to 4 on Sunday, too. Restaurants ____ pubs usually open from 11a.m to 11p.m. Some _______ come for a few hours in ______ afternoon. People usually ______ a meal between 1 to 2 in the afternoon and between 7 and 9 in the evening.

-2015<x<2015

<=>x E {-2014;.....;2014;2015}

tổng các giá trị của x:-2014+...+2014+2015

=(-2014+2014)+(-2013+2013)+...+2015

=0+0+...+2015=2015

tích các giá trị của x:(-2014)....0...2015=0