A: Where are you nowB: We _________ on the Great Wall of China and talking to you.

a great desire to have a home of his own, ______ he had always lived with his grandmother

Yangzi River is the _______ river in China.

lecture, the professor told his students how to write an ______ of a graduate paper, expressing the main argument.

Yesterday, Jane walked away from the discussion. Otherwise, she ____ something she would regret later.