——— Ring me at six tomorrow morning, will you? ——— Why that early?  I ______ . 
#104934
A
will be sleeping
B
have slept
C
have been sleeping
D
will sleep
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He________Beijing,so he knows a lot about it.
#99171
A
has gone to
B
has been to
C
went to
D
goes to
Three months ____ before we knew it.
#102692
A
passed by
B
went
C
went by
D
past