. --- Do you have any trouble explaining the sentence?         ---No, _____

After the operation, Bill has been doing a lot of physical exercise to build up his _____.

Itis ______ to have achieved so much in such a short time.

—I hear your new head is a little arbitrary in making decisions.— _________, he often listens to our suggestions!

He became the ________ of criticism by the readers for his newly­published book.