阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或者使用括号中词语的正确形式填空。

    How much do you know about elephants? The elephant is one of Thailand's symbols. Their (one) flag had a white elephant on it. This is a symbol of good luck.

    Elephants are smart . They can play soccer or music. They can also draw very (good). People say that " elephant never forgets". Elephants can walk for a long time and never get . They can also remember places food and water. This helps them to live.

    But elephants are in great danger. People cut down many trees elephants are losing their homes. People also kill elephants for (they) ivory. Today there only about 3, 000 elephants (over 100, 000 before). We must (save) the elephants and not buy things made of ivory. Remember that March 13^th is Thai Elephant Day.