while___(cross)the street,you must be careful
while___(cross)the street,you must be careful
You must be careful when you cross the street.改为祈使句
you must be careful when you cross the street.(同义句)
you must be careful when you cross the street中可以用if替代when吗
If there___on the street,you must be more careful to cross i
连词成句:cross,be,the,when,careful,you,street
You must be more careful when____(cross) the crowded streets
you must be careful when you ( )the street
you must be ____(care)when you cross the street.
You must be ___when you cross the street
You must be careful when crossing the street.改为祈使句
Be careful when you cross the street.为什么用cross而不用across?