this is the second time she / improvement on that equipment; a:ha_英语解答

this is the second time she / improvement on that equipment; a:has made;

人气：448 ℃　时间：2019-11-12 06:37:10

解答

答案为has made
这是固定句型：this/it is the first/second/third...time+that-从句,意思是：第几次干某事.
在从句中要求用现在完成时.