After the mass shootings at Sandy Hook Elementary School, President Obama ordered his members to ________ solutions to gun violence.
A．put up with B．come up with
C．keep up with D．catch up with
The monthly sales of Mo Yan's works ________ 199 times compared with those before he won the Nobel Prize for Literature.
A．accelerated B．stretched
C．multiplied D．switched
Though the “No smoking” signs have existed for long in public places, heavy smokers often ________ them and light up cigarettes.
A．abandon B．postpone
C．decline D．ignore
It is necessary that parents should ________ the responsibility of helping their children develop legal awareness.
A．take on B．carry on
C．look on D．keep on
Somehow, the old man had ________ a dangerous secret, one which could not be discussed in a room on a military base.
A．put out B．let out
C．set out D．cut out
We recently did a simple experiment, which happens to ________ how children's knowledge of what a hero is like determines their behaviour.
A．congratulate B．acknowledge
C．distinguish D．illustrate
