The man is wearing sports clothes. He must______for exercise. A .running B.be runningThe man is wearing sports clothes. He must______for exercise.A. running B. be running C. run D. to run

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The man is wearing sports clothes. He must______for exercise. A .running B.be runningThe man is wearing sports clothes. He must______for exercise.A. running B. be running C. run D. to run
The man is wearing sports clothes. He must______for exercise. A .running B.be running
The man is wearing sports clothes. He must______for exercise.
A. running B. be running C. run D. to run

The man is wearing sports clothes. He must______for exercise. A .running B.be runningThe man is wearing sports clothes. He must______for exercise.A. running B. be running C. run D. to run
C.run must是情态动词,情态动词后用原形

B.他可能要去运动