The incomes of skilled workers went up.________，unskilled workers saw their earnings fall.

The famous professor’s lectures, though ____ informal, are considered far more informative and interesting.

To tell the truth, his pronunciation is ___________ terrible.

Reports say the plane crashed 15 minutes after it took off, killing all 157 passengers _____

As the idea of low­carbon life is now ________ accepted, more and more people   travel by public transport.