By the end of the 21st century, Chinese astronauts …………… on Mars. A. will be landing B. will be landed C. will have been landed D. will have landed
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
By the end of the 21st century, Chinese astronauts …………… on Mars.
A. will be landing
B. will be landed
C. will have been landed
D. will have landed