[ Articles and Demonstratives ]
____ book is ____ instrument made to learn.
A. a….an
B. an….a
C. the….an

Random Topics:
used to vs be used to vs get used toTransitional WordsAuxiliaries VerbHope, Thank, Modal VerbsWH- Question WordsGerund or InfinitiveComparative and Superlative AdverbsSimple Present vs Present ProgresiveBe Going To vs. WillConditionals and Modals of ProbabilityOther quiz:
Passive Voice › ViewThe documents ___ by 5 p.m.
A. will have been signed
B. are signed
C. will be signed
Prepositions of Place and Time › View
He usually goes on holiday ______ July.
A. in
B. on
C. at