It is well known that man is much cleverer than any animal. But which is the cleverest a{#blank#}1{#/blank#} the animals? Some scientists t{#blank#}2{#/blank#} it should be Alex，an African grey parrot. He is unlike any other animal. He can really t{#blank#}3{#/blank#} with people!

    When he says "come here", he really w{#blank#}4{#/blank#} someone to come up to him.

    "Alex is as clever as a c{#blank#}5{#/blank#} of2or3yearsold," says Dr. Pepper erg. "He does not just repeat the s{#blank#}6{#/blank#} he has been taught. He u{#blank#}7{#/blank#} the words!"

    Alex can tell about 50 d{#blank#}8{#/blank#} things, name 7colours and count from 1 to 6.Is the parrot actually thinking in the w{#blank#}9{#/blank#} man does? Nobody can say. But the q{#blank#}10{#/blank#} is very interesting.