Day 1US sets sight on Mars (P2)Choose the answer:1. The goal of Obama’s Mars plan is to _____.A. send humans to live on MarsB. make the journey to Mars easier
21世纪报社版权所有,未经书面授权,禁止转载或建立镜像。 主办单位:中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号