[ Tenses ]
My friends ____ their group work when the teacher suddenly fell. When they noticed that she was on the floor, they ran to her.
A. do
B. did
C. is doing
D. were doing
E. was doing
Select your answer:

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Clint decided to take the family ranch and split it into a subdivision so he could make money renting out properties.
A. A housing development
B. An industrial complex
C. A shopping center
D. Smaller farms
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Driver _______ fall asleep at the wheel.
A. must
B. mustn’t
C. should
D. shouldn’t
