Do you know the stages every inventor must before they can have their invention .
A. go through; approve
B. go through; approved
C. get through; approval
D. look through; approved
网友回答
A. go through; approve
(答案→)B. go through; approved
C. get through; approval
D. look through; approved
解析：考查动词短语和时态。go through经历，详细检查；完成; get though完成；到达；渡过；用光；(使人)明白；通过；接通(电话); look through仔细查看，浏览，温习;根据句意可知第二空应该使用过去时。结合句意可知B正确。结合句意可知B正确。句意：你知道吗？每一个发明者在取得自己的发明之前必须经历的过程得到认可了。