Bob said he was going to join our club but he didn’t. What a shame! He ______ his mind.
It was so dark in the cinema that I could hardly ______ my friend.
—Time is limited. I have to finish this tonight.—But it’s midnight now and you should have a sleep ______ much work you have to do.
—Robert is indeed a wise man.—Oh, yes. How often I have regretted ______ his advice!
Occasions are quite rare _______ I have the time to spend a day with my kids.
—Was it by cutting down staff _____ she saved the firm?— No, it was by improving work efficiency.