All passengers______go through safety check before they take a plane.
#74193
A
can
B
may
C
must
D
ought
推荐题目
--How does Jack usually go to school?  --He_____________ride a bike, but now he_______________there to lose weight.
#78085
A
used to, is used to walk
B
was used to, is used to walking
C
was used to, is used to walk
D
used to, is used to walking
This book isn’t mine. ________can it be?
#78297
A
what else
B
who else
C
which else’s
D
who else’s
This cake is very sweet. You      a lot of sugar in it. 
#62688
A
should put
B
could have put
C
might put
D
must have put