东南亚的主要粮食作物是______,泰国、______、______是世界上重要的稻米出口国。
水稻;越南;缅甸
撒哈拉以南非洲面积最大的自然景观是[ ]
A.热带沙漠
B.热带草原
C.热带雨林
D.温带草原
If you want to talk to your teacher,you should _____ first.[ ]
A. called to her
B. called up her
C. call her up
D. called her up