People in other parts of the world have been______(observe) Christmas for many c

游客2023-09-18  23

问题 People in other parts of the world have been______(observe) Christmas for many centuries.

选项

答案 observing

解析 本题考查动词的时态。has/have been doing为现在完成进行时,表示从过去某时开始一直持续到现在的动作,并且还将持续下去。例如:It has been raining all day.It is still raining right now.(raining是在现在right now之前的一段时间里一直在持续的动作。)此句中have been observing表示从过去到现在一直过圣诞节,并且还将延续。
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