The science of medicine, _____ progress has been very rapid lately, is perhaps the most important of all the science.
This kind of work a high level of concentration.
“Goodbye”she said, without evenfrom the book she was absorbed in.
I have _____ all my papers but I still can’t find my notes.
---Would you please go and get Dr. White? ---Well, he’s already been .
We must notice the use they are the new energy.