Thinking that the students were having an evening class, the teacher left the classroom, _____.

I can’t meet you on Sunday. I’ll be ________ occupied.

It was ________ that the tourists wanted to spend more time taking pictures outdoors.

 Running a company is not ______ a matter of hiring people ----they also need to be trained.

— Are you going to travel during this summer vacation?— No, I’ll have to do some part-time job for my study. __________, there’s a disease spreading.