1Wife_____abigdinnerwhenhusbandwasawareoftheireighthweddinganniversarythatday.为什么是选hadhardlyprepared?而不是wasstillpreparing呢?2Theychatted___coffeeabouttheirexperienceasvolunteersduringthecharity.为什么是

　　1Wife_____abigdinnerwhenhusbandwasawareoftheireighthweddinganniversarythatday.

　　为什么是选hadhardlyprepared?而不是wasstillpreparing呢?

　　2Theychatted___coffeeabouttheirexperienceasvolunteersduringthecharity.

　　为什么是over?

　　3Amajorissuewasputforwardbysomerepresentativesattheconference__theteachersintheremoteareaswereunderpaid.

　　为何选that而不是whether?