He tried to deal with the ever-increasing burden of his work,but finally _____ and had to take a complete rest.
--- Do you mind if I record your lecture? --- ________. Go ahead.
My chest _______ when I make a deep breath, doctor.
--- How can I use i Phone 5s? --- Just refer to the _________.
What I need is book that contains ABC of oil painting.
---Have you read the book? ---Yes. But that one is _____worth reading. I suggest you______ it if you have time.