先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案．

    Dogs have feelings just like you and me．They cry when they are 1 ， and they smile when they are happy．It's true．Dogs have a lot of ways of 2their feelings without using words．You just need to 3 their body language．For example，what does it 4  when your dog wags his tail(摇尾巴)? He is telling you that he is happy,or that he is   5 something．When your dog puts his tail 6 his legs，he is probably afraid，or not feeling  7 ． Also，it isn't hot outside，but does your dog look like he is panting(喘气)?Don't worry!He is fine．It may be strange，8that's how dogs smile when they relax．Here is a(n) 9 ． You can try it at home．Ask your10 ， "Do you want to go for a walk?"Watch his body language closely,and you'll probably see him answer,"Yes!"