30. He _____ his potential had it not been for his desire to meet new challenges.
But even though the robot so clever, he would have to be rebuilt—you can not have Womenin love with machines.
Mary is proud a record by running two laps this year.
is more important isas the earth cooled down, water began to appear on its surface.
life will continue on the earth for millions of years to come will depend onthe problem of pollution can be solved.
The factLucy has been admitted into Lanzhou university made us excited.