用括号所给单词的适当形式填空
（1） I take my dog out for a walk __________(one) a day.
（2） There’s somebody ________(hide) behind the door.
（3） Sandy does her homework ________(careful) than Tom.
（4） There are many tall ________ on both sides of the street.(build)
（5） Why does she look ________ today? What’s the matter?(worry)
（6） He is old enough. He can do it by __________.(he)
（7） It’s great _______ to play with my pet.(funny)
（8） Please write a short passage about your dog at _______ 100 words.(little)
（9） Many _________ come to visit the Great Wall every year.(visit)
（10） Don’t climb over the wall. Look! It says, “It’s ________”(safe)