[ 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

Random Topics:
Article the or zero article (-)Verb TensesAdjectives or AdverbsNouns FormationAuxiliary Verbs (be, do, have)To infinitive - GerundGrammar Present Perfect (ever never)Modals of ProbabilityGrammar - Present Perfect with for and sinceCoordinate ConjunctionOther quiz:
Tenses › ViewI …… as a flight attendant and I have done for a few years now.
A. work
B. working
C. had working
D. had been working
Modal Verbs › View
It ___ rain, so bring an umbrella.
A. might
B. could
C. should
D. would
Present Simple › View“I stay at home ________ weekends”
A. on
B. in
C. at
D. every
Grammar & Vocabulary › View
. In the UK, many small companies have the letters ‘___________’ after their names. This means that the owners have limited liability.
A. Ltd
B. plc
C. business
