[ Modals ]
A: The Great Wall of China took around 2500 years to build. B: Thousands of people ______ in the construction. A: Yes indeed millions.
A. must have worked
B. might have worked
C. mustn’t have worked
D. cant have worked

Random Topics:
Past Simple Negative & QuestionsGrammar - used toVocabulary, Adjective & PrepositionPresent Continuous for FutureSimple Present Continuous TenseRelative - ConditionalFormal & Informal WordsModals AuxiliaryZero and First ConditionalsSentence Structure and Grammar RulesOther quiz:
Grammar › View“Colin’s got to stay in bed for eight weeks.”
“I’d hate to…………do that.”
A. will have to
B. must
C. have to
D. will
Tenses › View
They played soccer yesterday.
A. Present Simple
B. Present Continuous
C. Past Simple
D. Future Tense
Grammar and Vocabulary › View_____ James drive a car?
A. Do
B. Are
C. Can
Grammar › View
She went to see a doctor about the pain in the lumbar area of her __________.
A. calf
B. physiotherapist
C. push-ups
D. spine
