As we all know, the Changjiang River is the____river in our country.( )
A.longB.longestC.highD.highest
Lots of people exercise every morning_____bad weather stops them.( )
if
unless
until
since
How far is it from Chongqing to Guiyang?
It's about two_____ride by high﹣speed train.( )
hour
hour's
hours
hours'
Who's the little girl in the photo, Laura?
It's me. This photo____when I was five.( )
is taken
takes
was taken
took
My math teacher lives an active life. She looks as____as she was ten years ago.( )
young
younger
the youngest
youngest
You____stop when the traffic lights turn red.( )
can't
may
must
needn't