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1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37
=(1+37)x37:2
=703
III. (Questions 31-37): Complete the following questions with the correct preposition (1,4 pts)
31. In a game of singles, two players play……against……….….each other.
32. You'll get wet if you go out……without……….….a raincoat because it is raining.
33. The students are tired………of…….….watching TV all days
34. Many people participate……in……….….jogging every morning.
35. We’d like a walk instead……of……….….riding a bike.
36. They study and listen to music……at……….….the same time.
37. Will you be home ……for……….….dinner tonight?
III. (Questions 31-37): Complete the following questions with the correct preposition (1,4 pts)
31. In a game of singles, two players play...against... each other.
32. You'll get wet if you go out ...without... a raincoat because it is raining.
33. The students are tired ...of... watching TV all days.
34. Many people participate ...in... jogging every morning.
35. We'd like a walk instead ...of... riding a bike.
36. They study and listen to music ...at... the same time.
37. Will you be home ...for... dinner tonight?
