[ Tenses ]
Are they working now?
A. Present Simple
B. Past Continuous
C. Past Simple
D. Present Continuous

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A. must be starting
B. have to start
C. has to start
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A. for
B. yet
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Tenses › View
What tense is this sentence?
He expresses his doubts about the validity of the theory during the discussion.
A. past
B. present
C. future
