[ Grammar ]
Every night the watchman turns on all the lights and …around the building every half an hour.
A. walks
B. is walking
C. walked
D. to be walking

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Will and Will notSimiles and Body IdiomsGrammar and PrepositionPossessive NounsModal Verbs of Deduction and SpeculationPerfect TenseDefinite and Indefinite ArticlesSimple Present Negative and QuestionPresent Simple and Present Continuous TensesAdverb PhrasesOther quiz:
Grammar › ViewThe students were working in the class, when the the internet connection_____(fail).
A. was failing
B. were failing
C. failed
Grammar and Vocabulary › View
We didn’t go _____ last year. We stayed in this country.
A. abroad
B. holiday
C. sightseeing
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A. stopped
B. stop
C. stops
D. stopping
Past Tenses › View
The past perfect continuous emphasizes the duration of an action.
A. TRUE
B. FALSE
