— How long will it _____ man can find an
题型:选择题
问题:
— How long will it _____ man can find another planet like the earth?
— Ten years or longer.[ ]
A. since
B. after
C. until
D. before
— How long will it _____ man can find another planet like the earth?
— Ten years or longer.[ ]
A. since
B. after
C. until
D. before