-How long has the film been on?-___3:30.A.At B.About C.Befor

-How long has the film been on?-___3:30.A.At B.About C.Befor 英语现在完成时 How long has the film been on?为什么要用on? 1.the film __ for half an hour.A.bagan B.has been on C.have How long has the shop__.A,been open.B been opened 答案是B为什么 How long has he _ Beijing?A gone to B gone C been in D been How long has your grandmother___?a.died b.has been died c.de How long has the hous been on fire The film ____for half an hour.A.has begum B.has been begum C how long has the bookstore been in business ——2000 A when B 1._______ has Hanmei been in the library?(原因) A.How long B.H 空 has the film been on.Ahow long Bhow often Ch He has been away ____A.How long B.How often C.How soonD.How