[单项选择]The mail was delayed for two days because of the snowstorm.
A. held on
B. held up
C. held down
D. held off

[单项选择]The shipment was delayed because you had failed ______ the necessary space.
A. to order
B. to place
C. to take
D. to book

[单项选择]The passengers were delayed because the flood ______ the train service.
A. analyzed
B. stabilized
C. visualized
D. paralyzed

[单项选择]All______to Hong Kong were delayed because of bad weather．
A. fly
B. flights
C. flyings
D. flies

[单项选择]All ______ to Hong Kong were delayed because of bad weather.
A. fly
B. flights
C. flyings
D. flies

[单项选择]All _________to Hong Kong were delayed because of bad weather.
A. fly
B. flights
C. flyings
D. flies

[单项选择]The mail was delayed for a week because of the flood.（　）
A. held in
B. held on
C. held off
D. held down

[单项选择]The mail was {{U}}delayed{{/U}} for a week because of the flood.
A. held in
B. held on
C. held off
D. held down

[单项选择]You have stayed at home for two days. It’s time you ____ for a walk.
A. go out
B. went out
C. will go out
D. would go out

[单项选择]The mail was {{U}}delayed{{/U}} for two days because of the snow-storm.
A. held in
B. held up
C. held down
D. held off

[单项选择]Within two days, the army fired more than two hundred rockets and missiles at military ______in the coastal city.
A. goals
B. aims
C. targets
D. destinations

[单项选择]

On the past few days, two nations with large numbers of AIDS-infected people have announced plans to distribute a triple cocktail of life-prolonging antiretroviral drugs free to all who need it. China has been treating 5,000 patients and plans to expand the program to cover everyone in the country. South Africa’s cabinet approved a plan that includes drugs for all who need them.
China spent years denying it had an AIDS problem. Until recently, South Africa’s top officials minimized the epidemic, questioned whether H. I. V. was the cause of AIDS and labeled antiretroviral drugs "poisons". Both countries have now taken a courageous and essential step.
But only one is likely to succeed. Indeed, China’s program is already failing. One in five Chinese who have received antiretroviral drugs has already stopped taking them, which can lead to the creation of drug-resistant strains of the virus. China has only about 100 doctors nationwide with e
A. it has more medical experts in AIDS than China.
B. its government shows more enthusiasm.
C. it devotes more money to this cause.
D. it's population of patients is decreasing.