问题
选择题
Scientists said the smaller the airborne particles, the more ______ they are to cause illness.
A.possible
B.likely
C.probable
D.perhaps
答案
答案:B
题目分析:考查形容词。本题考查短语的固定搭配:be likely to有可能……。句意:科学家说,空气尘埃粒子越小,它们造成疾病的可能性越大。故B正确。