四、选词填空。
根据语篇内容，从方框中选择恰当的单词，并用其正确的形式填空。每个单词只能用一次。
out mistake one you put stop teacher fact junior remember

Our maths teacher Mr Li writes an equation(方程式)on the whiteboard and says，“Copy this into 1. notebooks.”
We begin writing immediately. I finish the first line and 2. ______ .
“The formula(公式)looks strange. Should I point it 3. ？Would he get angry on the 4. day？” Questions jump into my mind.
“Why do you stop，Zhang Wei？”
I look up nervously. Mr Li’s sharp eyes look onto mine. My hands feel shaky.
But then I remember my father’s words：“Numbers never lie.” I take a deep breath and 5. up my hand.
“Mr Li，there’s a 6. ，” I say. “The square root symbol(平方根号)covers only half of the equation here.”
“Excellent observation(观察)，Zhang Wei，” he smiles. “In 7. ______ ，this is my first lesson for all of you. In 8. ______ high school，true learning begins when you question what you see. Never hesitate(犹豫)to seek(寻找)truth(真相，真理)，even from your 9. ______ . Please always 10. ______ this.”
That moment teaches me more than any formula ever can.

1.your 2.stop 3.out 4.first 5.put 6.mistake
7.fact 8.junior 9.teachers 10.remember