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Sound travels ______ air ______ a speed of about 340 metres per second.
#47987
A
over; in
B
through; at
C
by; at
D
through; over
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I get up______6:40______the morning.
#48246
A
at; at
B
in; in
C
at; in
D
in , at
I like to spend time      my grandparents on Sundays.
#47815
A
for
B
in
C
on
D
with
 _______ our surprise, he got the first place in the game!
#46692
A
To
B
For
C
As far as
D
As soon as
When and where were you born? I was born _______ a cold morning of 1999______ Dandong .
#45904
A
in,in
B
on,on
C
in,on
D
on,in
–How long has Mr. Liu taught English?     --- _______ 1998.     
#48596
A
ince     
B
In
C
or 
D
t