1. Though he started to learn to operate the machine as recently as last month, he can work ____________________ .
2. He worked very hard, but ____________________ .
3. Before he left for Shanghai, ____________________ .
4. He wrote to his friends, saying that ____________________ .
參考答案：
1 as fast as a skilled worker now
2 couldnt perform as well as his parents had expected
3 he promised that he would go and see his grandparents as often as he could
4 after finishing his studies abroad he would come back as soon as possible
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