[ 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:
VOCAB & GRAMMARPast Perfect or Past Perfect ContinuousThe Past SimpleGrammar: is/are/was/wereConditional SentenceVerb PhraseGive, do and makeAuxiliary WordsPhrasal Verb & Prepositional PhraseCompliment, Congratulation, and HopeOther quiz:
Comparative and Superlative Adverbs › ViewTim worked ___________ than Tom.
A. quietly
B. more quietly
C. most quietly
Grammar › View
I’ve heard a lot about Dr. James, and I’m looking forward ____________ his talk tomorrow.
A. hear
B. hearing
C. to hear
D. to hearing
Adverbs and Adverbial Phrases › ViewI love unusual foods, I’ve _____ tried fried insects!
A. even
B. ever
Tenses › View
. She _____with her parents in London.
A. lived
B. lives
C. living
