We have to ____the sports meeting till next Friday because of the bad weather 
#56623
A
put up
B
put away
C
put on
D
put off
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Great changes __ in the city in the past 20 years, and a lot of factories ____.
#59531
A
have been taken place; have been set up
B
have taken place; have set up
C
have taken place; have been set up
D
were taken place; were set up