His ability ____ mathematics in a short time is wholly ...

[ Adjective / Noun + to Infinitive ]

His ability ____ mathematics in a short time is wholly admirable.

A. not to work out

B. work out

C. to work out

D. working out

Select your answer:

Random Topics:
Comparative Adverbs, Modals, Preposition of time Noun Phrases Noun and Pronoun Participle - ing/ ed Fragment, Comma Splice and Run -on Sentence Adjective or Adverb Bare Infinitive and To Infinitive Definite and Zero Article

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_______
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