Please write a report ________ the above subjects are to be covered.
B
inwhichtheabovesubjectsaretobecovered是report的定语从句。which指代先行词report，in用于与report搭配。
The policeman came up to the lonely house with the door _______, _______ there for a while and then entered it.
Thegirlwasluckyenoughto_______thebadmenandranaway.
Heshookhandswiththevisitors________astoconveyhisapology.
TheWesternCouncilforTravelResearchin_______employedthetermvisitor.
_______ he goes, she will go, and she never cares _______ happens.