找出下列每组词中不同类的一个，将其字母标号填入前面括号里。(10分)
（ ）（1）A.boy B.girl C.today D.teacher
（ ）（2）A.Mike B.Amy C.John D.School
（ ）（3）A.apple B.dog C.ant D.elephant
（ ）（4）A.dad B.fish C.mom D.grandpa
（ ）（5）A.six B.eight C.key D.nineteen
Please look____the baby when I go out.
A.for B.in C.after
Tony must _____ good at ice-skating.
A.is B.be C.are
Do you like_____, Gogo? Of course .Let’s go.
A.swim B.swimming C.swimming
This is ____ very expensive watch.Don’t touch it.
A.an B.a C.the
Yesterday ______ my birthday. I ______ a party at home.
A. was, had B. is have C. was have