We should ______ our seat belts on the plane.
fastel
fast
faster
fasten
Be careful when you go down the ______.
stairs
What should we do at the bus station?
line up
eat food
wear a helmet
use the phone
Everyone should follow the traffic ____.
role
ruler
rull
rule
What should we do in the hospital?
be noisy
be loud
be quiet
You ________ eat food here.
may
should not
can
should
What should I wear when I ride a bicycle?
helmet
headphones
glasses
gloves
