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—Will you be       this afternoon, John?
—I am afraid not. I have an appointment with my dentist.

The students were ________ over the ________ problem，listening to the teacher with a ________ expression on their faces.

The ________　temperature of the human body is about 37 degrees centigrade.

_____ fighting is not allowed in our society, because we love peace and friendship.

While the government says there is a(n) ______ supply of houses, prices of apartments have been going up these years.      

Other businesses, such as insurance companies, are more concerned with acquiring a central position so that they are ______ to the urban population.

--- The report is difficult to write.
--- You can surf the internet, where you can find _____ information and useful expressions.

They eat less sugar and that’s ______ they have ______ white teeth.

--- Have you seen “Titanic” 3D?
--- Not yet. It’s said to be ________ worth seeing than the original one.

The instant coffee is really tasty, and I’m going to have ________ cup later.