实用英语语法精华班  
第8节 时态  
主讲人:徐国庆  
针对训练  
.完成句子  
.The twins,who ________ (finish)their homework,were allowed  
to play badminton on the playground.  
答案】ꢀhad finished  
.—Hi,let's go skating.  
Sorry,I'm busy right now.I ________ (fill)in an application form  
for a new job.  
答案】ꢀam filling  
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