【Ifoundthehomeworkwasmuchmore_____iusedtohave.应该填thanwhat,但不明白为什么不填thanthat?Heisnotinterestedinthosetexts,_____aretoodifficulttohim.应该填mostofwhich,为什么不填mostofthem或mostofthat?Thebi】

　　Ifoundthehomeworkwasmuchmore_____iusedtohave.

　　应该填thanwhat,但不明白为什么不填thanthat?

　　Heisnotinterestedinthosetexts,_____aretoodifficulttohim.

　　应该填mostofwhich,为什么不填mostofthem或mostofthat?

　　Thebirdwasluckytomiss____.

　　为什么应该填beingshot?

　　还有两题

　　Beijing,_____the2008OlympicGames,callsonallitscitizenstolearnEnglish.

　　应该填perparingforhosting,为什么不填areperparingforhosting?

　　withonlinecourseLynnhasover300studentsalloverChina______herclassthroughtheInternet.

　　空格填attending，