The robot needs _______ once a month. And we will check it for you for free.
#48844
A
to check
B
checked
C
checking
D
to checking
推荐题目
You must be tired. Why not_________ a rest?
#50811
A
to stop to have
B
to stop having
C
stop to have
D
stop having
-- Our English teacher tells us that ______ grammar is a good way to learn English.--And our teacher says _____ also helpful to sing English songs.
#50325
A
study, that was
B
is studying, it’s
C
studying, it’s
D
studied, that was
---Do you prefer _______ to Beijing by air?---I would rather _______ a train.
#48467
A
going, to take
B
going, to take
C
to go, take
D
to go, to take