The old .engineer’s eyes still shone bright in the wrinkled brown face and his step as he came across the room was________，though slow.

Oh, boy, why are you just playing games all day? Can't you find something ______ doing at all?

It isn’t quite         whether the teacher will collect the homework by Friday, so you needn’t hurry.

 “I don’t understand what you are saying,” she said, with a _____ expression on her face.

What he said sounds ____.