用括号中所给单词的适当形式填空。 （1） He is old enough. He can do it by ________ (he). （2） It’s great ________(funny) to play with my pet. （3） Please write a short passage about your dog at ________ (little) 100 words. （4） Many ________ (visit) come to visit the Great Wall every year. （5） Don’t climb over the wall. Look! It says, “It’s ________ (safe).”
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