选连语填空（英语）,麻烦帮忙!有解释更好,谢谢
Whilealthoughbutso thatbecause that
during after because of due to



31 I read the report [31] my journey.
32 He caught up with his work [32] he was travelling home on the train.
33 I couldn’t read the fax[33] the paper got stuck in the machine.
34 Please reply to this e-mail [34]checking the information.
35 I managed to reply to the enquiry[35] our computers were down.
36 The problem with the e-mails was [36]a technical fault.
37 I made careful notes [37]I could remember the conversation.
38 It was such a long letter [38] I couldn’t be bothered to read it all