——Mary stays alone in the classroom and looks sad.——________ to her?
#62149
A
What happens
B
What is happened
C
What is happening
D
What was happening
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—_______ your mobile phone number, Mr. Wang? —13409964565 
#62670
A
What
B
What’s
C
How’s
D
Where’s
The math problem is so hard. I really don’t know    .
#62035
A
how to do it
B
how to do
C
what to do it
D
where to do it
I’m sorry_____ that you’re not feeling_____.
#62073
A
to hear, good
B
hear, good
C
hear, well
D
to hear, well