The subway was crowded with passengers going home from market, most of ________carrying heavy bags and baskets full of fruits and vegetables they had bought there.

Americans and Canadians can understand each other ______ they don’t speak the same kind of English.

Who are you waiting ________ the school gate， Millie

rom the moon, our earth with water____ seventy percent of its surface, appears as a blue ball.

With the help of high technology, more and more new substances ______ in the past 10 years.