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:
A B C D E

Random Topics:

Present Perfect Continuous Adjective Clause and Adverb Clause Adverbs, Modals, Preposition of time Contractions and Conjunctions Present Continuous -ing / Infinitive Conjunctions and Prepositions Present Perfect Simple and Continuous Noun, Verb, Adjective Must Vs Have to

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