一个三角形中的钝角最多有（ ）
A．1个 B．2个 C．3个
( )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
( )Can you tell me more ______your school?
A. about B. toC. with
( )Thank you ______your help.
A. toB. for C. of