When deeply absorbed in work, _______he often was, he would forget all about eating or sleeping.
Don’t leave your work .
The book is of great value can be enjoyed form it until you have a deep understanding of it, however.
One of the sides of the board should be painted yellow, and .
---You don’t often see them, do you? ---No, I see of them.
He is clever and hard-working, so he has reason to succeed in the exam.