问题
Has Tommy finished his project yet–Maybe not. He ___on it at lunch time. Let’s go to have a look now.
A:has worked
B:is working
C:was working
D:had worked;
B:is working
C:was working
D:had worked;
正确答案是：
同类题型
intelligent people can often ____ the complex ,a fool is more likely to complicate the simple .
made Bill so angry— _____ His girl friend promised to comeat 8:30, but she hasn’t come yet
The students will take morning exercise every day, _________ it rains
It’s not considerate (体贴人的) ________ you to take __________ of the little boy