Cats and dogs often have dreamless sleep.A．RightB．WrongC．Not mentioned

According to the passage, dogs and cats,A．as well as human beings can not see some colours

Attila Andics found out that humans and dogs have similar______.A．nervous systemsB．social

We notice this ____ true very often with dogs and cats.A: to beB: beC: beingD: to bein

Nowadays, skilled workers such as carpenters, electricians and TV repairmen often have hig

Ted: Im thinking of keeping a dog, and I wonder if you have any particular policy about an

Birds have a sharp sense of sight and dogs have a