On April 24, Tsinghua University         its 100th anniversary at the Great Hall of the People in Beijing. 
#72632
A
congratulated
B
challenged
C
celebrated
D
participated
推荐题目
 She _______herself ______as an American.
#69996
A
passed ;off
B
passed; through
C
passed; on
D
passed; by
Your luggage is overweight, so you must decide what to ______. 
#66710
A
leave out
B
divide into
C
cut off
D
carry on