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
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![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](/uploads/image/z/703413-45-3.jpg?t=%E8%8B%B1%E8%AF%AD%E5%8D%95%E9%A1%B9%E9%80%89%E6%8B%A9%E8%AF%95%E9%A2%98By+the+end+of+the+year+2050%2Cair+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%E6%9C%AC%E4%BA%BA%E5%88%9A%E8%80%83%E5%AE%8C%E7%9A%84%E8%8B%B1%E8%AF%AD%E8%AF%95%E9%A2%98.%E6%9C%9B%E8%AF%A6%E5%B0%BD%E8%A7%A3%E9%87%8A%2C%E5%B9%B6)
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
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.
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
A.will have become
到2050年,(现在还没到,所以是将来时,而by.直到.通常要用完成时)
空气污染就会成为威胁到人类健康的一个严重的问题.
因为有一种影响/结果,所以一定要用完成,而时间还没到呢,所以要用将来.
即:将来完成时.
shall主要第一/三人称,
will第二人称,还可表示客观,shall多主观.
A
by结构通常时态为完成时。2050并未到来,因此是将来时
shall表示将来时,主语通常是第一人称
选A
By the end of + 将来的时间状语,要用将来完成时,所以排除BC
shall 只用于主语是第一人称的时候,所以也排除。
a
shall 通常第一人称