高中英语单选——过程左右结果
Wehave_____booksinourschoollibraryand_____thebooksareborrowedandreturned.
A.agoodmany;agreatmanyB.alargenumberof;agreatmany
C.agoodmany;agreatmanyofD.agreatmany;agoodmany
请详细说明选的理由和其他项不选的理由,