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Ⅰ.用所给词的适当形式填空 1．(1)We are all concerned about her safety because she hasn't come back from her journey yet. (2)There is some cause for concern but no need for alarm.(concern) 2．(1)After two hours' frustrating delay，our train at last arrived. (2)I'm feeling rather frustrated in my present job；I need a change. (3)Life is full of frustrations;_we should try to be optimistic.(frustrate) 3．(1)The little girl was frightened by the big dog. (2)He was shaking with fright；I thought he must have seen a ghost. (3)The bird came to the window，but I moved suddenly and frightened it away. (4)He was woken up by a frightening dream.(frighten) 4．(1)John seems content to sit in front of the television all night. (2)As he had to drive home after the party，he contented himself with two glasses of beer.After the cat was fed，it purred in obvious contentment.(content) 5．(1)We were fearful that she would be angry. (2)Experts fear that there will be a new outbreak of the disease.(fear) 6．(1)The garden was beautiful once，but has been sadly damaged. (2)Sad to say，the weather here has been nothing but rain all week.(sad) .同义转换 1．His mother was a great teacher and she contributed all her life to the cause of education. | 
