[ Grammar ]
____ the problem sum many times to his student, Mr Tay gave out a sigh of frustration.
A. Have explained
B. Having explained
C. Have had explained
D. Have been explaining
Select your answer:
Random Topics:
Prepositions and AdverbsDependent ClausesWill and Going toModals Posibility and ProbabilityPresent Tense vs Present ContinuousGrammar - must & have toSimple Present and Present ContinuousAcademic VocabularyVocabulary and TensesOther quiz:
Vocabulary › ViewIt is a ________ not to run in the hallway at school.
A. rul
B. role
C. rule
D. rull
Vocabulary › View
A group of citizens who decide a court case.
A. Amendment
B. Jury
C. Press
D. Bill