29.— Come on, please give us some more explanation about the project.— Oh, sorry. With so much work ______ my mind, I almost break down.
I _______ the dance performance many times, each giving me a new understanding.
The economic impact study was conducted by a group of _______ selected MBA students at the University of Kansas.
_______ any other species, human populations are shaped by the usual forces of natural selection, like famine, disease or climate.
— I’m terribly sorry to keep you waiting for so long. — _______.
It’s extremely dangerous for the drivers to _______ speed as the traffic lights are changing.