Whether the buildings in this area should be pulleddown has remained ________; people are still looking for other possiblesolutions

Not until the early years of the 19thcentury______ what heat is.

8I was disappointed with the film I hadexpected ______ to be much better

下列各句中，没有语病的一句是（ ）

________ is this notebook–It must be Anna’s. Her name is on it.