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
My grandma ______ dinner when I got home yesterday.
#42386
A
cooks
B
will cook
C
is cooking
D
was cooking
It is said that the meeting _______ for a week.
#41750
A
has been ended
B
has lasted
C
has began
D
has been held
A new bridge over the river now ,You can see many railway workers and engineers working every day．
#36141
A
is built
B
is being built
C
has been built
D
should be built
--- What did your daughter say in her letter? --- She told me that she ________ Cambridge University already with her friends.
#37900
A
had visited
B
have visited
C
was visiting
D
visited
The children _______ a PE class on the playground when it suddenly began to rain.
#42155
A
have
B
are having
C
had
D
were having