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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 8 o’clock now.  Tom must _____ to school .
#49024
A
goes
B
to go
C
go
D
going
Running in the morning can make me  ________ relaxed .
#50248
A
felt
B
to feel
C
feel
D
Feeling
His mother wants him _____ at home today.
#50049
A
stays
B
stayed
C
to stay
D
staying
Mary called and asked her husband        home at once, because she locked her daughter in the home.
#49272
A
to leave
B
leave
C
go
D
to go
I spent half an hour ___________ my homework.
#49163
A
finish doing
B
to finish doing
C
finishing to do
D
finishing doing