_____ that he isn’t adequate to the present job, he devotes all his spare time to studying  professional knowledge.

Anyone _______ bags, boxes, or whatever, was stopped by the police.

Having answered the phone，I couldn’t but     what would happen next．

When I entered the room, I found a little boy _____ on his mother’s knees _____ to draw a picture.

I can’t imagine _____that with such a famous author.