Mary is very clever and_____ worth teaching , but her brother is not .Look he is now _____ asleep in class.

My uncle's house in the downtown area is much smaller than ours，but it is twice________expensive.

—Jane, Peter has got a well-paid job in a foreign company.—You mean he is much _____ now.

— It’s a warm day, isn’t it?— Yes, it’s __________ cold．I just wear a jacket．

_______the temperature，______ water turns into steam.