单项选择题
A．He distinguished himself in low temperature physics. B．He fell in love with Natasha Willoughby. C．He became a professor of Mathematics. D．He started to work on refrigeration.
A．Search for the best cure. B．Hurry up and live life. C．Write a book about her life. D．Exercise more and work harder.
A．Voice. B．Intelligence. C．Appearance. D．Manners.