题目

We __________ our English teacher since he moved to Beijing.A. didn’t hear from                  B. haven’t heard from  C. didn’t receive                     D. haven’t received 答案：B世界的陆地主要分布在（     ）A．北半球、东半球B．北半球、西半球C．南半球、东半球D．南半球、西半球