请先阅读下面短文，掌握其大意，然后用方框所给的词的适当形式填空，每个词限用一次。

    It was a fine day in autumn. Some girls and boys were out ____ their teacher. They ____ to a museum. On their way to cross a bridge, they suddenly(突然地) heard a loud shout behind ____. The teacher told her pupils____ . Then she turned and listened. When she heard the cry“Mad dog!”she knew what was happening. ____ she could do anything, she saw a dog running to them.“____”said the teacher, “keep close to each other. Don't move or cry.” Then she stood before the children so that the dog would meet her first. The animal came quickly.

    At this moment the teacher saw a man. He ran up with a gun(枪) in his ____. “The children must be kept safe ____ the man comes.” Thought the lady. The teacher ran to the dog, facing it bravely. The mad dog snapped(猛咬) at her and she fell down. The man came and killed the animal. The dog had bitten her so ____ that the brave lady died soon after the doctors arrived. She lost her life for her ____. When people heard of this, they said, “The brave lady will always be remembered among us!”

如图，在矩形ABCD中，对角线AC、BD相交于点O，点E、F分别是AO、AD的中点，若AB=6cm，BC=8cm，则△AEF的周长为（　　）

Julie: Are you OK, Bill? You look tired.

Bill: Tm fine, Julie. I just ____ (stay) up late last night to write an English article. It is time for me to improve my English writing.

Julie: Read as many things you're interested in as possible,____ soon you'll realise that there are many different ways of saying ____ same thing. After all, having a variety of sentence ____ (structure) in your writing makes your English appear better.

Bill: Reading can also broaden my vocabulary. What kind of books should I read?

Julie: You can choose books ____ (write) by native speakers. They, often contain sentences ____differ from those commonly seen in English textbooks.

Bill: Good idea. But sometimes I don't know what to write about and find ____ hard to write a long article.

Julie: I suggest you begin by writing short ones about topics you're interested in, such as movies and sports.

Bill: Yes, III write something every day.

Julie: Writing all the time is the key to improving your writing.

Bill: Quite right. Practice ____(make) perfect.

Julie: It's ____ (easy)said than done. But in the end, it's worth the work you've put in.

Bill: Thank you for giving me such ____ (value) advice.