34.The meeting will be held in the school hall, _________ permission of the headmaster

By the time my mother came back from work, my sister and I supper and were waiting for her at the table

_ __ with the size of the whole earth, the biggest ocean does not seem big at all.

wn to us is that the 2016Olympic Games will be held in Rio de Janeiro, Brazil.

Now more and more people are trying _____ using plastic bags, wooden chopsticks and napkins to protect the environment.