I'd like to be a professional singer, but I don't think I've got
Jack wasn't saying anything, but the teacher smiled at him __________ he had done something very clever.
The experts were doing their experiment in the lab, __________ what happened outside.
The old man stood by the window, __________ his eyes on the people playing in the park.
If you are a man who always __________ to do everything, you are unlikely to achieve your goal.
Many people are against the new policy while some lawyers are __________ it.