国民党军被迫放弃对解放区的全面进攻，而改为对下列哪些解放区的重点进攻（）
A.陕北
B.山东
C.山西
D.河南
参考答案：A, B
The lecturer began by _____ us where the island was, and went on _____ about its
history.
A．telling；talking
B．to tell；to talk
C．telling；to talk
D．he told；talking
