_____ work has been done to prevent the river being polluted. A .A number of B A mass of C Several D. A good many
______ environmental damage is done,it takes many years for the ecosystem to recover.
If Susan ______ for ten more minutes at the party last night, she might have met Johnny Depp, the famous Hollywood star.
Passers-by rescued a motorcycle driver ______ under a burning car.
More people are choosing to work ______ retirement age.
—Where would you like to sit? In the corner or near the platform?—______.I would like to sit by the piano so that I can watch the musician play.