1.At the age of four,the outstanding champion of the World C

1.At the age of four,the outstanding champion of the World Cup Athlete Tournament could stand there ______ to watch the game for a few hours.
A.silently B.silent
C.to be silent D.of silence
2.Identify the errors in the following sentences:Be sure to recall to lock your bicycle when you leave it in the parking lot.
A.Be sure B.recall
C.when D.parking lot