more than 20 million men than women in this country   

Some will be lucky and some son't maybe?

In Pakistan but 50/50 actually 49(male) to 51% in the world so be less culturally blinkered.

about which country are u talking about? surely a single woman have to marry 4 men

You are talking about which. It could not be Pakistan.
Well then boys will some other country to find out there partner. Because one boy can marry 4 lady and can handle them but one lady or women can not do it.
So surly the boys will go outside to find out there partner.

Oh i see. You are talking about china. Well now i stay in China. And i know Chinese girl really like foreigners. Most of my foreigners boys classmate have there Chinese girl friend. And they are going to marry them.
And every year so many student come to china to study. So Chinese girl will hold there hand.

Those are strange odds because globally speaking there are more women than men in the world. Which country are you talking about? I could understand if you were talking about China because up until pretty recently any females that were born were killed. So, there I could understand the upset of balance.
Even so, it always works out in the end because not everyone wants to be partnered. Many people prefer to stay single (such as myself). So that takes care of that.
Purrs,
Catwoman=^..^= & Mija

acutally there are an interesting trend not all of them
some guys who born in 70s man dating with 80s women born in 80s man dating with 90s girl born in 90s boy paly games so the 20million men'problem got solved

Don't worry, they can go other country and find their partners.