Kate _________ in America for many years, but she’d never regretted her decision to return to her motherland.
| A．worked | B．was working | C．has worked | D．had worked |
In 1969 ____took his biggest step away from the earth. Americans first walked on the moon.This is certainly just a ____thought.
| A．he,moving | B．people ,surprising |
| C．an astronaut, interesting | D．man ,beginning |
If Greeks and Turks had not helped each other after the earthquakes five years ago,they____ mortal enemies instead of friendly neighbors later on..
| A．would have been | B．might be | C．should have been | D．must have been |
Advances in using genes as well as nanotechnology make it likely __humans will live in the future beyond ____has been possible in the past.
| A．that ,which | B．what, that | C．that ,what | D．where , what |
. I don’t ____rock’n roll ,it is much too noisy.
| A．go in for | B．go over | C．go away with | D．go into |
Hanoi declared that it ______by fast-spreading H1V1, which ____other countries nearby.
| A．was being struck ,had hit | B．has been struck,had hit |
| C．has been struck ,has hit | D．will be struck , has hit |