问题
选择题
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
答案
答案：B
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。