sales of cars up by 30% last year, the traffic in Beijing has become increasingly terrible.

______, his mother has to take care of him at home.

With everything she needed ________， she went out of the shop, with her hands full of shopping bags.

When I passed this afternoon, I saw a little boy was lying on the grass, his hands _____ under his head.

With a lot of difficult problem___, the newly-elected president is having a happy time.