They all say Avatar is a good movie which is worth _____ second time.

Let’s go Dutch for this supper，OK—No，________ this time，as a reward for all your help.

_________to see us, the professor gave us a warmwelcome.

The World Health Organization warned that Asian countries __________ attentive to bird flu since Asia ___________ got rid of the disease completely.

The wildlife park is very large. Follow your ________, or you’ll get lost easily.