With a lot of problems ___________,the newly-elected president is having a hard time.[ ]

My deskmate exercises regularly every day，so he is always________and studies efficiently.

5, 2011 _______a verybright night in Nanshan Middle School that will never _______from memory Our schoolhas made great breakthrough in the field of education

Einstein’s Theory of Relativity was so__________that few people could understand it at that time.

The USA once ___ ___ war against Japan in 1945 and now it is bombing Libya.