The price of petrol(汽油) is not _______ that of last year, so some more people are planning to buy cars.
Be careful, ___________ you will fall off the tree .
______it be Peter? No, it______ be Peter, It ______ be Tom.
________Tony with Sam often play tennis after school?
He joined the army __________2000.
Among those foreign guests are two_____, four______ and six______.