A heavy learning burden leads to unhealthy behaviors such as poor eating habits, which ___ damage the health of students.
| A．in its turn | B．in return | C．in turn | D．by turns |
America will never again have as a nation the spirit of adventure as it ______ before the West was settled.
| A．has | B．did | C．was | D．would |
I was awfully tired when I got home from work, but a half-hour nap ______ me.
| A．revived | B．released | C．relieved | D．recovered |
Hardly a month goes by without ______ of another survey revealing new depths of scientific illiteracy among US citizens.
| A．words | B．word | C．a word | D．the word |
Although she is new here, she seems to be ______ with everyone who comes to the store.
| A．admired | B．admitted | C．accepted | D．acquainted |
The thieves ______ the waste paper all over the room while they were searching for the diamond ting.
| A．spread | B．scratched | C．scattered | D．burned |