He failed the midterm examination and only then ________how much time he had wasted.

Would you ___ him how to deal with it, had it been possible —Yes, but I ____too tired, or I _____ him a hand.

It looks _________ people _________ the work.

Mum, could you buy me an MP4 like this— Certainly, we can buy ______ one than this, but ______ this.

The little boy stood there，________by the dog.[ ]