有关宾语从句的几题---has recently been done to improve the taxi servi

有关宾语从句的几题___has recently been done to improve the taxi service,we still get a lot of complaints about it .A In spite of whatB Even whatC Though it D ThatYou may borrow as many books as you like,so long as you show them to ___is at the deskA whoeverB whoC whom D which