[ Grammar ]
I regret ……… that we are unable to accept your offer.
A. to say
B. say
C. saying

Random Topics:
Gerund vs InfinitiveModal and Relative PhrasesAction vs Linking Verbs/ Verb PhrasesPassive Voice - Present ContinuousGrammar & VocabularyTo infinitive - GerundComparison of Adjective and AdverbPresent Simple ProgressiveLinking VerbDescribing WordsOther quiz:
Tenses › ViewYou ….. a lot since I saw you last.
A. change
B. changed
C. have changed
D. are changing
Tenses › View
Tom: Hi Ana. I _____________ (try) to ring you several times today.
A. Have tried
B. Have been trying
C. Have been tried
D. Trying
