[ Prepositions ]
The computer technician is working ____________ the problem right now.
A. at
B. on
C. of
D. for

Random Topics:
Grammar : Must (Necessity)Comparison DegreeGrammar-Present Continuous-Sentence MakingFuture SimplePresent Perfect & Past Simple TenseModals: Possibility, Necessity, ExpectationSimple Future - WillGrammar: Have toApostrophes and GrammarRelative Clauses and Past PerfectOther quiz:
Vocabulary › ViewWhat is the meaning of the word ‘dusk’?
A. To delay something until a later date
B. The darkest part of twilight
C. Having recently died
D. An organised fight between two people
Grammar › View
None of your decisions _________.
A. matter
B. matters
Grammar › View____ as the representative at the conference, she felt extremely proud of herself.
A. be chosen
B. having been chosen
C. on choosing
D. Having chosen
Conditional Sentences and Verb Form › View
Unless she_______, she’ll be late.
A. hurries
B. didn’t hurry
C. hurried
D. will hurry
