I.单项选择。
( ) 1. –How long can I __ this book, Madam? --Two weeks.
A. borrow B. le nd C. keep D. had
( ) 2. When the head teacher came in, all the students stopped _______.
A. talking B. to talk C. to speak D. speaking
( ) 3. -- Who _____ the light bulb?
–Thomas Edison.
A. discovered B. found
C. invented D . founded
