（ ）I'm sure you know the difference_______"look at" and "watch".
A.from B.for C.to D.between
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A lot of people think that animals in the zoo are happy,but m_____of them are sad.Do you know why?Animals like tigers,lions,and bears usually live in f_____or mountains.They run,j_____,play with their children and catch small animals f_____food.But now they have to stay in c_____or small animals.The zoo keeper give them food.They do not have to f______food by themselves.They do nothing but eat,walk and sleep every day.