They have just formed a car pool ,so today it is Mrs Smith’s turn to the children from school in the community .
It is said that in Australia there is more land than the government knows _______.
The research is so designed that once _______ nothing can be done to change it.
Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it.
_______ such heavy pollution already, it may now be too late to clean up the river.
Robert is said _______ abroad, but I don’t know what country he studied in.