" Astronauts are ______ all kinds of tests before they are actually sent up in a
spacecraft.
" A. inclined to B. subjected to C. prone to D. bound to
出自:西安交通大学--英语三

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块