At least 300 million people are using QQ_____ by Ma Huateng to chat online.
#51158
A
create
B
created
C
creating
D
creates
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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
____ more information about the school, you can go to www. sjz42.com.
#49823
A
Find
B
Finding
C
To find
D
Found