1．Try to keep a ________ (平衡) between work and relaxation.
答案：balance
2．The exhibition ________ (记录) the history of the palace.
答案：charts
3．Lying flat on the floor, and cross your ________ (上面的) leg over your body.
答案：upper
4．We know that LCD ________ (显示器) is the use of digital works.
答案：display
