Look! The light is still on. Is Mr Wu working in his office？—No, it _____ be Mr Wu. He has gone to Nanjing for a meeting.

How long _____ in this job? – Since

Computers of today can work than the ones in the 1970s.

Today my mother is feeling ______ to go to work.

I can’t stop smoking, doctor.— For your health, I’m afraid you________.