[ Past Modals ]
I _______ have helped you if I had known you needed assistance.
A. could
B. could have
C. must
D. should

Random Topics:
Modals of AdvisabilityContinuous TensesPast Simple (to be)Adverb of Frequency and TensesVerb BETenses StructureVerb Forms and TensesFigurative Language VocabularyQuantifiers & Modal VerbsAdjectiveOther quiz:
Vocabulary and Grammar › ViewThis town used 50% __________ other towns
A. more electricity than
B. more than electricity
C. than more electricity
D. electricity more than
Determiners › View
__________ of the two sisters is married
A. Both
B. Every
C. Each
D. Any
