In the global economy, a new drug for cancer, ______ it is discovered, will create many economic possibilities around the world.
—My sister is very upset today. —It’s your fault .You the bad news to her yesterday.
After series of unsuccessful attempts, he has finally passed driving test.
In the face of danger, we need to stay ____. Only in this way can we come up with good solutions.
Yesterday we went to visit the farm ____ my father used to work for nearly ten years.
Every minute must be made full use of ____ our lessons, for the final examination is coming.