小怪兽的小胖兽
不知道是什么语境,如果是随意问问是在问了对方问题对方反问whyask的情况下:nothingserious/(如果对方显然很不满的话用nooffense)+curiosity表示只是好奇或者+nevermind表示别在意就好。至于随意抽查可以直接用random(ly)check或者如果是throwpopquizzes(突击考试),还是不清楚语境所以可能不准确
贝贝克2011
It happens that the customs is doing spot-check. Our goods have to go through the inspection since they have been selected.