校本课程是由（）提出的
A.杰克逊
B.帕克赫斯特
C.菲吕马克
D.布鲁纳
参考答案：C
地球上最大的生态系统是[ ]
A．海洋
B．热带雨林
C．草原
D．生物圈
---- Hi , Randall,Come on in .
----Uh, yeah, I __________ by to see if you ___________ for a roommate to share your house.
A．stopped; were still looking
B．will stop ;are still looking
C．have stopped ; were still looking
D．stop ; will have looked
