( )为房地产抵押存在的抵押方式。
A．建筑工程后期抵押B．房屋贷款抵押C．在建工程抵押D．在建工程抵押和预购商品房贷款抵押
参考答案：D
As soon as the children _____ themselves in their seats in the classroom, the bell rang.
A．sat
B．settled
C．took
D．put
国家职业资格全国统一鉴定智能化职业考试科目都是上机考试。
