Itrainedhardyesterday,______preventedmefromgoingtothepark.
A、thatB
本句話為非限制性定語從句，所以不能用 that 來引導。在本題中， prevent 由于是行為動詞，所以正確選項應為 B。
It_______methreeyearstodrawthebeautifulhorses.
Theboycomplained_______apaininhisstomach.
Thetwogirlscompetedwitheachother______thehighestmark.
Aftermonthsofvoyage,Columbusarrivedin______laterprovedtobeanewcontinent.
Hewouldhavegivenyoumorehelp,ifhe________sobusy.
