By the year 2170, people _____ cities and industries on Mars.

A. establish
B. established
C. will have established
D. have established
相關(guān)習(xí)題

科目：高中英語 來源：0109 期末題 題型：單選題

By the year 2170, people _____ cities and industries on Mars.
[     ]
A. establish
B. established
C. will have established
D. have established

查看答案和解析>>


同步練習(xí)冊答案