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

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Present Perfect ContinuousAdjective Clause and Adverb ClauseAdverbs, Modals, Preposition of timeContractions and ConjunctionsPresent Continuous-ing / InfinitiveConjunctions and PrepositionsPresent Perfect Simple and ContinuousNoun, Verb, AdjectiveMust Vs Have toOther quiz:
Modals and Tenses › ViewFormulate a future simple sentence: We ___ (travel) to Paris next summer.
A. We will travel to Paris next summer.
B. We are traveling to Paris next summer.
C. We traveled to Paris next summer.
D. We travel to Paris next summer.
Grammar › View
The delegates from each country __________ tomorrow.
A. arrives
B. are arriving
C. will arrive
D. will be arriving
Tenses › ViewZaki does not do his homework.
(+) …
A. Zaki does do his homework.
B. Zaki does his homework.
C. Zaki do his homework.
D. Zaki his homework.
Vocabulary › View
What is the definition of ‘tirade’?
A. A period of a thousand years
B. A long, angry speech of criticism
C. Concise and forcefully expressive
D. The action or process of receiving something that is given