[ Vocabulary and Idioms ]
Mr. Nixon refused to answer the questions on the _______ that the matter was confidential.
A. reasons
B. excuses
C. grounds
D. foundation

Random Topics:
First ConditionalsIndependent and Dependent ClausesPast Progressive TenseContrastive ConjunctionArticles and DemonstrativesGerunds + To InfinitiveInterjection & Prepositional PhrasesSuperlativesTenses and ArticleTenses StructureOther quiz:
Verb-ing and Infinitive › ViewDon’t let him ………………….. yet.
A. goes
B. to go
C. going
D. go
Tenses › View
Are you working here?
A. Present Simple
B. Present Continuous
C. Past Simple
D. Past Continuous