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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
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推荐题目
It is necessary for us________ good habits in our daily life.
#50502
A
keep
B
to keep
C
keeping
D
kept
My teacher told me __________ hard on my English.
#48513
A
work
B
working
C
worked
D
to work
---On summer nights the weather is usually very hot.---Yes, so I often go to sleep ______ the windows ______.
#49009
A
with, on
B
have, open
C
with, open
D
with, closed
Xu Qian loves        jokes .
#50848
A
tell
B
tells
C
in tell
D
to tell
The room isn’t big enough for us ________.
#49741
A
to live
B
to live in
C
live in
D
living in