Hewouldhavegivenyoumorehelp,ifhe________sobusy.
B
本题考察与过去事实相反的虚拟语气。
We_____knowledgefromourfamilies,schools,jobs,andthemassmedia.
Notuntilrecently_____thatThompsonhadbentellingthetruthallalong.
Jennycomplainedthatthehospital________hertoomuchforthetreatment.
Aftermonthsofvoyage,Columbusarrivedin______laterprovedtobeanewcontinent.