It______Mike and Mary who helped the old man several days ago.A.was B.are C.were D.had been这个貌似是考主谓一致了,但是这里为什么要用单数was?

It______Mike and Ben who cleaned the windows yesterdayA.was B.were It______Mike and Mary who helped the old man several days ago.A.was B.are C.were D.had been这个貌似是考主谓一致了,但是这里为什么要用单数was? mar是什么意思 英文MAR是什么意思 MAR是什么意思? HEAVEN是什么意思? mar什么意思 MAR是什么意思啊? mar-ket是什么意思? mar up什么意思 手表mar是什么意思 mar怎么读? 这句话咋翻译呢The sharp drop in car sales in Feb was purely due to CNY and a big jump in Mar is expected. 我有一批货从韩国发到香港,Place and date of issue HONG KONG 23-Mar-12,Port of loading INCHEON,KOREA,这个地方到港要多久时间 EXP/MAR/23/2011是什么意思 Mar翻译成中文是几月? Mar 23rd怎么读 cafe del mar chillhouse是什么 英语翻译% EMD_FMSIN.M%% P.Flandrin,Mar.13,2003 - modified Mar.2,2006%% computes and displays EMD for the sum of 2 sinusoidal % FM's + 1 Gaussian logon %% displays reassigned spectrograms of the sum signal and of % the 3 first modes extracted%% pr