[ 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:

Random Topics:
Present Simple and Continuous TenseSuch...that, so ......thatQuantifiersSimple Future - WillGrammar Comma UsagePast Perfect Simple & Past Perfect ContinuousPast Simple TensePunctuationGRAMMAR - Could / Could notSentence or Sentence FragmentOther quiz:
Vocabulary › Viewa group of two or more atoms that form the smallest identifiable unit through chemical bonds
A. atom
B. element
C. compound
D. molecule
Prepositions › View
Our class usually starts … 7.30 pm.
A. no preposition
B. in
C. at
D. on
