Scientists can only ________ on life on other planets.
A、prospect
B、accelerate
C、speculate
D、analysis
Scientists can only ________ on life on other planets. A、pr - Unit 2 College-The ladder to success? - 新视野大学英语2(思政版) - 重庆高校在线开放课程平台 | 大学网课搜题引擎