You must ___(be) careful (在红绿灯处)
You must ___(be) careful (在红绿灯处)
You must ___(be) careful____(红绿灯处)
you must be careful
you must be careful when you ___ with fireworks
You must be careful with your handwriting.(改为祈使句)___ ___ wit
We must ___(be) careful.
you must be careful when you ( )the street
You must be careful to drive the car.改为同义句___ ___ ___to driv
when crossing street,you must be careful
You must be _(careful) than before.
you must be careful改为祈使句
You must always be careful with it .