The doctor did everything he could ______ the patient.
--When did you become a volunteer for the elderly?-- Two years ago. I ______ this group since then.
He met many problems ______ he was going over his lessons.
--What about finding out ______ Alice is going to Wuxi?--I’m afraid her friends have told her Wuxi has many places of great interest.
--Just a minute. I’ll go to get some apples for you.--Thanks, but you ______ get too many. One is enough.
It is said that about ______of the books and magazines in the world______in English.A. four-fifths;are written B fourth fives;are written C, four fifth;were written D fourth fifths; were written