May 12, 2008 , a terrible earthquake happened in Wenchuan . Lots of buildings __________ , and many students lost their lives .                           
#37327
A
fell down
B
got down
C
sat down
D
put down
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Listen, a small number of students ______ in the classroom. 
#40135
A
talk
B
talks
C
is talking
D
are talking
Tom usually _________ a bike to school. Look, he _______ to school now.
#38165
A
rides; is riding
B
is riding; is riding
C
rides; rides
D
is riding; rides