题目内容
19、—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
试题答案
19、D
相关题目
—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
—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
查看习题详情和答案>>—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
查看习题详情和答案>>
—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 |