After he became conscious, he remembered __________ and __________ on the head with s rod.

A．to attack; hit

B．to be attacked; to be hit

C．attacking; be hit

D．having been attacked; hit

影响气候的主要因素有（　　）

①太阳辐射  ②地球形状  ③地球运动  ④海陆分布  ⑤地表起伏  ⑥人类活动  ⑦动物活动．

A．①⑦

B．②③④⑤

C．①③④⑤

D．①②③④⑤⑥