The first is that e-mail is delivered instantly, so it can be (34) __________ very effective means of (35) _________ when speed is important.Đoạn văn35/50 The first is that e-mail is delivered instantly, so it can be (34) __________ very effective means of (35) _________ when speed is important.transportationentertainmenttravellingcommunicationGiải thíchD. communication