He would have given you more help, if he ________ so busy.
A、havenotbeenB
本题考察与过去事实相反的虚拟语气。
We_____knowledgefromourfamilies,schools,jobs,andthemassmedia.
Thefurnitureinherbedroomisquitedifferentfrom________inthelivingroom.
Becauseofthebadweather,thesportsmeethadtobe________.
Theprofessoraskedaquestion,andDavid________agoodanswer.
Themeeting_____nextweekwillbeofgreatimportance.
