All of the flowers now raised here have developed from those _______ in the forest.
| A．once they grew | B．they grew once | C．they once grew | D．once grew |
Many parents prefer kindergartens to spend more time teaching math and Chinese to help their kids _______ an early lead in primary school performance.
| A．bring up | B．take up | C．build up | D．add up |
A new study finds that sitting can shorten a person’s life almost as much as smoking can, which _______ just how damaging inactivity can be.
| A．estimates | B．highlights | C．dominates | D．ensures |
The policy will _______a chain reaction of automatic spending cuts that can lead to thousands of job losses.
| A．set down | B．set off | C．set out | D．set about |
Landing safely in bad weather is a _______ task for any pilot, and even the smallest error can lead to a disaster.
| A．tricky | B．secure | C．significant | D．easy |
The discovery of the oil field, to the delight of the whole nation, will largely _______ the country’s dependence on imports of energy.
| A．adjust | B．affect | C．settle | D．ease |