[ Grammar ]
Concentration is ________ by alertness.
A. Help
B. Will help
C. Helps
D. Helped

Random Topics:
Grammar & VocabularyAdverbial ClauseAdverb ClauseSentence Structure and PunctuationReported SpeechWas & Were QuestionsDegree of ComparisonCountable Vs Uncountable NounsEs and STenses - Pasive VoiceOther quiz:
Grammar › ViewWhich sentence is punctuated correctly?
A. After that the ghost finally showed up!
B. After that, the ghost, finally showed up!
C. After, that, the ghost finally showed up!
D. After that, the ghost finally showed up!
Vocabulary and Grammar › View
My brother goes to the Riders’ Club every Sunday. His hobby is ____________.
A. gardening
B. making models
C. horse riding
D. swimming