It __ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
The Chinese are proud of the Shanghai Expo ____ successfully in Shanghai in May,2010.
Don’t_____so rudely while she is telling you what happened.
He lost a valuable watch. But when I wanted to comfort him, he said, “_____”.
Einstein liked Bose’s paper so much that he ___ his own work and translated it into German.
–---Where was it that you found your bag? ----- It was in the restaurant _________ we had lunch yesterday.