[ Passive Voice ]
Do you believe that such a problem can ……………….?
A. solve
B. be solving
C. is solved
D. be solved

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Modals VerbsDemonstrative Pronounswill, be going to, would like toPresent Continuous for FuturePresent Progressive TenseVerb FormsSpeculation with Modal VerbsTransitional Phrases and ConjunctionsPast Simple & Past PerfectModal Verb, Passive VoiceOther quiz:
Grammar › ViewI don’t think anyone will _____ me in this outfit.
A. recognize
B. attract
C. know
Grammar › View
I hate ……stupid questions.
A. to be asked
B. being asked
C. to have been asked