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。
You’llbetheretomorrow--youwon’t________me________,willyou?
Shewas________beunabletospeak
Hefound_______difficulttostudymaths.
WhichofthefollowingisnotmentionedasWTO'sobjective?
Themissingboyswerelastseen________neartheriver.
