Cathy is American. She is teaching us English in China now.( )
A.aB.anC.theD./
Hangzhou ________ as the City of Silk.Tourists like shopping for silk there.( )
knows
is known
was known
will be known
Mom won't let Dick go out ________ he promises to be back by 10:00 tonight.( )
if
when
since
unless
Wow!You ________ dinner!Let's eat now.( )
cook
are cooking
will cook
have cooked
Mr.Liu is a really nice person﹣﹣﹣the ________ person I know.( )
nicer
nicest
happier
happiest
Don't take the dictionary away.I ________ it.( )
use
used
am using
have used