The World Health Organization gave a warning to the public without any______when the virus of H1N1 hit Mexico in April, 2009.
| A．delay | B．effort | C．schedule | D．consideration |
Eating too much fat can _______ heart disease and cause high blood pressure.
| A．result from | B．contribute to | C．attend to | D．devote to |
--- Tom, why didn’t you come to the meeting yesterday?
--- I _____, but my car broke down.
| A．would | B．had | C．was going to | D．did |
There is no doubt ______ man will conquer nature some day.
| A．whether | B．if | C．which | D．that |
______ different life today is from ____ it was 20 years ago.
| A．What a , what | B．How , what | C．What, what | D．What a , how |
Paper-making began in China and from here it ________ to North Africa and Europe.
| A．spread | B．grow | C．carried | D．developed |