The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.
. My suggestion is that Tom ______________ there on time.
. ____________ the rising birth rate and immigration, the declining death rate also resulted in the population growth.
. He was determined not to be the first _____________it.
We want to know whether the drug has an effect _______________ people's health.
____________their hats into the air, the fans of the winning team let out loud shouts of victory.