问题描述:
英语单项选择试题
By the end of the year 2050,air pollution ___a serious problem that endangers the health of the human race.
A.will have become B.shall become C.will become D.shall have become
本人刚考完的英语试题.望详尽解释,并解释一下shall和will用法上的区别.
By the end of the year 2050,air pollution ___a serious problem that endangers the health of the human race.
A.will have become B.shall become C.will become D.shall have become
本人刚考完的英语试题.望详尽解释,并解释一下shall和will用法上的区别.
问题解答:
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