-- Is air the lightest thing in the world?-- Not . Scientists from Zhejiang University have just developed the world’s lightest material.
#35412
A
now
B
yet
C
then
D
again
推荐题目
--_______ does she chat with friends on the Internet? --Once a week.
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A
How long
B
How much
C
How many times
D
How often
---- __________is the train station from this shopping mall, do you know?---- About 30 minutes by bus.
#35935
A
How much
B
How long
C
How far
D
How soon
-- _______ 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