It’s reported that the United States uses______ energy as the whole of Europe.

(2013·高考新课标全国卷Ⅰ)Try not to cough more than you can________since it may cause problems to your lungs.

Her clear and elegant prose ______ her _______ from most other journalists. 

 Doctors often advise us to pay more attention to our diets and mental health and to take ________ examinations.

Having lived in China for 8 years, Helen has a good ____________ of both English and Chinese.