选出不同类的单词
（1）happy sad excited headache
（2）headache toothache earache arm
（3）board angry sad happily
（4）head tooth earache eye
（5）what why how sick
( )He ______ on a farm.
A.work B. to work C. works
( )_______she work in a company？
A. Does B. IsC. Are
( )The girl begins _________again.
A. to study B. study C. studies
( )How many ______are there in your city?
A. library B. libraries C. a library
( )—_____does your grandpa work?
—She works in a cinema.
A. How B. Why C. Where