—Those scientists invented a robot to care for kids! —It’s not surprising.They ____ wonders all the time.
#103461
A
worked
B
were working
C
work
D
have been working
推荐题目
The driver could have survived but he          the seat belt.
#102832
A
had been wearing
B
hadn't worn
C
wasn’t wearing
D
didn't wear
The old worker insisted that he     old, and      back to working post again.
#103632
A
wasn’t;be sent
B
wasn’t;was sent
C
be not;send
D
isn’t;sent
Elizabeth believed the dog would die if _____ to her cruel owners so she kept it.
#103787
A
returning
B
was returned
C
it would return
D
returned