[ Tenses ]
In recent decades, the efficiency of the United Nations …………….. by a growing number of countries
A. will have been questioned
B. would be questioned
C. has been questioned
D. had been questioned
Select your answer:
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Simple Present Continuous TenseWas and WereVerb 3 formsGerund/ To Verb/ VerbAuxiliary and Modal VerbsPerfect Tenses of VerbsPrepositions and Prepositional PhrasesComparativePrepositions of Time, Place, and MovementOther quiz:
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A. in
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A. must be
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