问题

With his attention _____ on his book, he didn’t notice me enter his study.
A:focusing
B:focused
C:to focus
D:focus
B:focused
C:to focus
D:focus
正确答案是:
同类题型
_________ is it to your home town from here— Well, it takes over three hours to get there by car.
________ I always felt I would pass the exam, I never thought I would get an A.[ ]
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There is __ homework for us to do .It’s ___ to finish it in such a short time.