—Is Mr. Green in the office?
—No, he ________ be in the office. Look, the light in the office is off.
A. mustn’t B. can’t C. needn’t D. may not
—Is Mr. Green in the office?
—No, he ________ be in the office. Look, the light in the office is off.
A. mustn’t B. can’t C. needn’t D. may not
B