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

A expression appeared on his face when he learned his bike had been stolen.

The disappearance of dinosaurs made _______ the evolution and dominance of mammals on the earth.

My father often gets up ________7:30________the morning, ________Sunday.

“___ Libya’s oil production returns to normal, I guess, it will be fifteen months,” said a UN expert