The last BeiDou navigation satellite (北斗卫星导航) successfully last month.( )
A.was sent upB.sent up
C.has sent up
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
I have travelled a lot.I ________ speak four languages.( )
can
may
must
need