Tostudyaforeignlanguage,__________.
A、agooddictionaryshouldbeboughtAftersomanydayswithoutrain,thegroundquickly________thelittlerainthatfelllastnight.
Tostudyaforeignlanguage,__________.
SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
I'm______tograduateinthenexthalfoftheyear.
Wemust______thattheexperimentiscontrolledasrigidlyaspossible.