________ we admit that there are still some problems about the system of modern education,we don’t mean that it is of no use.
After seeing the movie.____.
The lecture began by _____us where the island was and went on _____about its history.
The sentence needs ______.
.As she is looking forward to ______from me ,please remember _______this letter on your way to school.
_____from the moon ,our earth ,with water ______seventy percent of its surface, appear as a “blue ball”