To his mind, the collaborative development of Beijing, Tianjin and Hebei province is to solve the problems _____ Beijing faces, such as overpopulation, traffic jams, and etc.
The boy __________ an apology for being late to the teacher.
She has already tried her best and she is __________ for her job. Please don't be too __________ about it.
He gave me some very __________ advice on buying a house.
It was necessary to __________ the factory building as the company was doing more and more business.
Leaves are found on all kinds of trees, but they differ greatly __________ size and shape.