the question is --- to land on the grassland A.if it is safe
the question is --- to land on the grassland A.if it is safe
It is no longer a question now ( )man can land on the moon.A
it is no longer a question now () man can land on the moon.
an area of water nest to the land,the ship inside it is safe
It is better to be on the safe side
Is it yuor a---- to the question?
it is easier for the land to become a
if you are sure that the road is clear ,it is always safe to
if you are sure that the road is c____,it is safe to cross t
if the road is___,it is safe to cross 为什么空里是填clear而不是empty?
it is for the man who can land on the moon A how wonderful B
It Is safe to register the letter containing the check.