We are not sure if it ______ when we have our school sports meeting on Friday. 
#36986
A
rained
B
rains
C
has rained
D
will rain
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—The light in his room is still on. Do you know _______?—In order to get ready for the coming exam.
#37690
A
why he stays up so late
B
if he works hard
C
what he is doing
D
when he will stop working
—That actor often joins in dfferent activities in Beijing. Do you know        ? —For 5 years.
#38357
A
how soon he will come back
B
how long he has stayed there
C
how long has he stayed there
D
how often does he go there
--What did you say just now? --I asked _______.
#36880
A
that I could open the door
B
could I open the door
C
how could I open the door
D
how I could open the door