选择适当的方法分解下列多项式
（1）x²+9y²+4z²﹣6xy+4xz﹣12yz
（2）（a²+5a+4）（a²+5a+6）﹣120．

    One day in the 1 class everyone is busy drawing pictures, but Xiao Ming is doing 2. When the bell rings for break（课间休息）, Xiao Ming gives his 3 to the teacher.

    The teacher looks at it and gets 4. "Why do you give me a piece of paper with nothing on it, Xiao Ming?" 5 the teacher.

    "I'm sorry, sir," says Xiao Ming. "I 6 a dog and some 7 on the paper."

    "Where's the dog and where's the bread?" asks the teacher.

    "I draw the bread 8. When I finish drawing the dog, he9 the bread. When I give it to you, he 10 away," Xiao Ming answers.

阅读短文，选择正确答案
    Come and see the Indian elephants and tigers from America. The koalas are waiting to meet you, and the monkeys from Thailand are waiting to throw things at you. The cute dogs from Australia are waiting to laugh at you, and the giraffes from Zambia are waiting to look down on you.
Tickets (票)                                           Time
Adult (成人): $ 6                                   June 1~ June 2
Children: Free                                       9:00 am.~ 7:00 pm.
Keep the park clean!
    Do not touch (触摸), give food or go near the animals!