稍大一些的建设工程项目总承包在多数条件下采用( )。

A．变动总价合同

B．固定单价合同

C．固定总价合同

D．变动单价合同

—Is your math book on the desk, Tommy?    

—No, it isn't. It's _______.    [ ]

A. in the drawer    

B. to the chair    

C. of the drawer    

D. for the desk