[ Conditional Sentence ]
Mary didn’t work hard enough, so she failed in her exams.
A. If Mary work hard enough, she wouldn’t fail in her exams.
B. Unless Mary worked hard enough, she would fail in her exams.
C. If Marr didn’t work hard enough she would fail in her exams.
D. If Mary had worked enough she wouldn’t have failed in her exams.

Random Topics:
TOEFLUsed to & would & Past SimplePresent Tense (Negatives and Questions)Quantifiers & Modal VerbsTenses and PronounsPrepositions and ConjunctionsPresent Simple and Present ContinuousDependent PrepositionPersonal PronounTenses - Present and PastOther quiz:
Mixed General Quiz › ViewArizona is probably best known ___ the Grand Canyon State.
a. to
b. for
c. as
d. of
must/should › View
They … sports clothes in the gym or they won’t be allowed to play.
A. must wear
B. should wear