在某博物馆，他们看到了下图“桀驾人车”汉画像石，这幅图反映的社会情况是

A．当时没有马作为坐骑

B．这是当时的一项体育活动

C．这是一种娱乐活动

D．奴隶的地位卑微，只是奴隶主的工具

Which of the following statements is NOT true of the passage

A．International trade has become an important part of national development.

B．Summit talks will be held to discuss problems in international trade.

C．Developing countries benefit more from international trade than development aid.

D．The Doha Development Agenda has made development its pivotal concern.