改错。下列各句均有一处错误，请指出并在横线上加以改正。
You can look for the word in the dictionary.         （  ）
A      B         C
. Children should allowed to spend time playing with their friends. （  ）
A                B         C
We must pay attention to the pronounce when we read words.   （  ）
A           B             C
My sister often studies by make flashcards.          （  ）
A       B      C
Can you tell me the different between the two pictures？ （  ）
A      B           C