—Those scientists invented a robot to care for kids! —It’s not surprisingThey wonders al
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解决时间 2021-01-23 13:27
- 提问者网友：你独家记忆
- 2021-01-22 13:25
—Those scientists invented a robot to care for kids!
—It’s not surprising．They wonders all the time．
A. worked
B. were working
C. work
D. have been working
最佳答案
- 五星知识达人网友：七十二街
- 2021-01-22 13:33
A. workedB. were workingC. work(答案→)D. have been working解析：考查时态。句意：这些科学家发明了一个机器人来照顾孩子。——不奇怪。他们一直在创造奇迹。可知下文描述的是现在已经完成的过去一直在进行的动作，故用过去进行时态。选D。
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- 1楼网友：何以畏孤独
- 2021-01-22 14:45
我学会了
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