[ Grammar ]
Only when ______ may vehicles cross the train tracks.
A. is the green light on
B. did the green light be on
C. on is the green light
D. the green light is on
Select your answer:
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Prepositions › ViewAll complete sentences must have a subject.
A. True
B. False
Tenses › View
By the time you arrive, I ___ (finish) my homework.
A. will have finished
B. will be finishing
C. will finish
D. have finished