But even with more traffic and fewer sidewalks, modern parents do have one advantage their parents didn’t: the cell phone. Being able to check in with a child anytime goes a long way toward relieving parental anxiety and may help parents loosen th...
答案B. 表可能性只能用may.此句意可从后半句推出。 比较have to和must 1) 两词都是"必须"的意思,have to表示客观的需要,must 表示说话人主观上的看法,既主观上的必要。 My brother was very ill, so I had to call the doctor in the middle of the night.我弟弟病得...
9. We feel you should not have done that. (page 24) 我们觉得你真不应该这样做。 should/ ought to have done sth 意为“本来应该干……,但未……” shouldn’t/ oughtn’t to + have done sth “本来不应该做……却做了” I wonder why she hasn’t written to us...
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