BY THE END OF THE 21ST CENTURY, CHINESE ASTRONAUTS...A. WILL HAVE...
22.
By the end of the 21
st
century, Chinese astronauts...
A. will have landed
B. will land
C. will be landed
D. will be landing
22.
By the end of the 21
st
century, Chinese astronauts...
A. will have landed
B. will land
C. will be landed
D. will be landing