my employer will___that i was there on time.1 assure 2 be sure 3 make sure 4 certify选择哪一个,及分别说出每个为什么对与错

employer employer是什么意思 employer 翻译成中文 employer of choice employer-employee rate是什么 Current Employer是什么意思`` employer employee是什么意思 employer employor都对吗, employer guarantee是什么意思 boss、employer区别 employer 是老板吗 previous employer什么意思 Intern Employer是什么意思 什么是Employer's employer sponsoredpensionplans是什么意思 employer support是什么 my employer will___that i was there on time.1 assure 2 be sure 3 make sure 4 certify选择哪一个,及分别说出每个为什么对与错 my employer will confirm that I was there on time为什么这句话里又有将来时又有过去时?