when__the library open?It __from 8a.m to 5:30p.m A.is；is openB.does;opens C.is;opens D.do;is open

when__the library open?It __from 8a.m to 5:30p.m A.is；is openB.does;opens C.is;opens D.do;is open OP是什么意思? OP是什么意思 our library library是什么意思 /t:library library card library是什么意思 Op-Ed Columnist Op-Ed library是什么意思library是英语单词 （1)The cinema______since 1993.A.has been open B.has been opened (2)When__the car__?A.was inventedB.has;been invented请问选什么?请说明理由, When__the forest fire which lasted three weeks__out?A.did,put B.has,put C.has,been put D.was,put 选哪个?麻烦要具体解释 你说的OP.什么意思?OP是什么? in the library还是at the library? OP-10乳化剂配方 乳化剂OP-10 分子量 含有op的单词 1.OP平分