—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
—Did you enjoy your holiday?—Yes, it’s the best holiday I ___________ these years.
#104293
A
had
B
have had
C
had had
D
would have
If you __________ me, I will give you some advice.
#104458
A
listen to
B
will listen to
C
listen
D
are listening
Whatever you have found，you should give it back to whomever it ________.
#99423
A
is belonged to
B
is belonging to
C
belonged to
D
belongs to
I thought it ＿＿ very boring, but it wasn’t.
#103593
A
is going to be
B
was going to be
C
used to being
D
can be
The price ________, but I doubt whether it will remain so.
#102421
A
went down
B
will go down
C
has gone down
D
was going down