Different customs around the world

In which country is considered ''bad luck'' to leave empty bottles (chai rỗng) on the table?

In Canada, sing half of national anthem in ___________

“Thumbs up “ in Germany can mean ___________

In Mozambique people clap hands _______before greeting

In ............it is rude to cross your legs in public

In Muslim countries , a person should use ______ to give and accept presents.

When people in Greece nod the head , they mean

In which country is it considered ''rude'' when you don't ''tip'' in the restaurant?

In some countries ''Coconut is cooked with rice'' yes or no?

In China, you shouldn’t give the people _______ as a present .

In which country in Asia is not allowed to ''speak on the phone'' in the public transport?

Impolite to open present immediately