完形填空。阅读下面短文，掌握其大意，然后从各题所给的四个选项中，选出最佳选项。
As a teacher, I think all students were dear to me, especially Mark.
Mark was very talkative, I had to         him repeatedly that talking without            was not acceptable. Every time I had to correct him for misbehaving. “ Thank you for correcting me, Sister!”        I became accustomed to hearing it many times a day.
Once my       was running out when Mark talked again, I       two pieces of tape(胶带) and made a big X with them over his mouth. When I          the tape, he still thanked me for correcting him.
One Friday, I asked the students to        the names of the other students on two pieces, leaving a       between each name, and then write down the        thing they should say about others.
Then I         all the lists and gave each student his or her list. Soon the entire class was smiling. “ I never knew that         anything to anyone!” “ I didn’t know        liked me so much!” Mark said, “Thank you for keeping me         , Sister.”
Later Mark joined the army and was         in Vietnam. After the funeral(葬礼), his father showed me something            on Mark. It was pieces of notebook paper that had        been taped and folded many times, on which were the good things that Mark’s classmates had said about him. His mother said that he behaved better and better         my list.
Mark’s classmates told me that they kept their own lists in        ways. Hearing this , I finally cried.
Sometimes the     things could mean the most to others. We forget when life will end. So       the people you love and care about, before it is too late.

A．comfort B．guide C．remind D．command

A．arrangement B．permission C．reason D．accuracy

A．Long ago B．Long after C．Long before D．Before long

A．skill B．time C．confidence D．patience

A．tore off B．broke down C．put away D．showed up

A．set B．removed C．get D．took

A．search B．ensure C．list D．plan

A．space B．hole C．chance D．words

A．worst B．first C．diverse D．nicest

A．repeated B．spelled C．changed D．organized

A．meant B．explained C．brought D．expected

A．friends B．people C．others D．students

A．informed B．warned C．cured D．accused

A．saved B．killed C．surrounded D．trapped

A．found B．written C．stolen D．examined

A．quickly B．obviously C．exactly D．properly

A．except for B．instead of C．in spite of D．because of

A．necessary B．useful C．differnt D．exciting

A．smallest B．biggest C．best D．strongest

A．evaluate B．forgive C．praise D．thank