We can easily become unhappy_____ we work out our problems in our daily life.
________your books in the bookcase,Jerry.
You should cut______an onion and a tomato first and then put them_____the blender.
—What' the next step? —Oh,please put some meat between two________of bread.
Please________hot water into the blender.
—Will there be more tall buildings in 50 years?—________.