. ----______are they staying in Beijing?----For three days. 
#35605
A
How often
B
How long
C
How old
D
How soon
推荐题目
The young man was hit by a truck .        he was not        hurt .
#35030
A
Lucky ; bad
B
Luckily ; terrible
C
Luckily ; badly
D
Lucky ; badly
-- _______ is it from Beijing to New York?--More than 30,000 miles.
#35811
A
How far
B
How often
C
How long
D
How much