In today’s information age, the loss of data _________ cause serious problems for a company.
A. need B. should C. can D. must
Without his support, we wouldn’t be _________ we are now.
A. how B. when C. where D. why
（题文）Ordinary soap, _________ correctly, can deal with bacteria effectively.
A. used B. to use C. using D. use
A rescue worker risked his life saving two tourists who _________ in the mountains for two days.
A. are trapping B. have been trapped C. were trapping D. had been trapped
In any unsafe situation, simply _________ the button and a highly-trained agent will get you the help you need.
A. press B. to press C. pressing D. pressed
China’s high-speed railways _________ from 9,000 to 25,000 kilometers in the past few years.
A. are growing B. have grown C. will grow D. had grown
