问题
选择题
Air and the sun's rays create much distortion, and whatever tends to _____ their influence is useful to the astronomer.
A．exclude
B．eliminate
C．extinguish
D．impose
答案
答案：A
exclude 排除。extinguish扑灭；eliminate消除。
impose 把......强加给：Don't impose your wishes on us.(不要把你的意思强加给我们。)