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:
Vocabulary › ViewMany people will say that I am vertically challenged.
Vertically means:
A. Intellectual
B. Handicap
C. Perpendicular
D. None of the above
Grammar › View
When I_______ the bookstore this morning, I saw a very interesting book.
A. was browsing
B. have browsed
C. am browsing
D. will browse
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
