The antonym of indigenous is ----

Point out the sentence with correct use of adverd ----

The girls __ a game called 'Bomb' for almost ten minutes when the teacher suddenly __ the classroom.

When I __ into him on the street, he said he __ abroad for business affairs that evening.

The government __ action for increasing taxes as soon as they __ by the IMF authorities .

Scientists ___ hard to find a new effective treatment which ___ most-scared diseases .

In two years, many of our school friends __ , and then we __ no hardship in keeping our international business...