they have started an investigation,____are being kept secret,a/ the details of whichb/ the detail of it

they have started an investigation,____are being kept secret,a/ the details of whichb/ the detail of it They started immediately when they ( )breakfast.A.hadB.had have C.have hadD.had had when they ___ 16.they started to work.A.get B.have C.catch D.reach They have gone to Xi'an,___(have) they? They ___several schools in the past five years.A.started B.have started C.were starting D start they have an English class () Monday () Friday Dogs___are usually quiet have started to bark.A.they B./ C.that请说明原因 虚拟语气的一道题,希望能给出答案并且解释If they ____ earlier,they ____ here now.A.had started,would beB.started,might beC.had started,would have beenD.will start,might have been You have started VMware Workstation with an out-of-date copy of the application.VMware Workstation You have started VMware Workstation with an out-of-date copy of the application.VMware Workstatio ()they(have)an English test next week?Yes,they are they have learnt English since three years ago.改为同义句____ three years ____ they started learning English. 英语翻译they started off at about 5 o'clock in the morning.they should have arrived there by now. they started off()an autumn afternoon A during B at C in D on为什么写出来 We couldn’t catch up with the others because they ————too long before us.A.started B.were starting C.have started D.had started 要有原因 We have never started是什么意思 have you started school yet? They left Changsha an hour ago.They have ______ ______ ______ Changsha for an hour.