This robot is supposed to save a lot of labor, but it remains a problem if it ______.
#37091
A
is
B
saves
C
does
D
has
推荐题目
 I hope ____ tomorrow .
#40120
A
him to be better
B
he will be better
C
him healthy.
D
he is healthy.
Thanks to the Internet, different kinds of information ________ in a short time.
#38990
A
can be learned
B
has been learned
C
can learn
D
has learned
Julie’s father _____ to London last month. He ______ there three times.
#36609
A
went; had gone
B
has gone; has been
C
went; has been
D
has been; has gone