— A young researcher is reported to have died of heart attack, aged only 30.
— ________ I wonder how his family could stand the thought of losing him.
A. How so? B. Forget it. C. Take it easy. D. Really a pity.
People spend half their time dreaming of getting rich, and the rest of their time thinking about all the things they ________ if they got rich.
A. will do B. did C. do D. would do
While John Snow attended Queen Victoria, he also thought about helping ordinary people ________ to cholera.
A. exposing B. being exposed C. exposed D. having exposed
As the population of the world is growing at the disturbing rate of 10，000 people an hour, nature is beginning to ________ us.
A. turn against B. turn up C. turn off D. turn around
The society can remain good as long as we are willing to fight for it—and to fight against whatever imperfections ________ exist.
A. shall B. may C. should D. would
Fishing in shallow water in autumn, ________ the water temperature is relatively high, does make sense.
A. when B. which C. as D. where
