用所给单词的适当形式填空。 1. It is raining ______ (heavy), I couldn't go out. 2. We enjoyed ______ (oneself) last Sunday. 3. We are excited ______ (see) each other. 4. The old man is very ______ (friend) to me. 5. Look, the sun is shining ______ (bright). 6. —Let's go ______ (skate). —Good idea. 7. Monday is the ______ (two) day of a week. 8. I ______ (can) ride a bike when I was six years old. 9. My brother fell off the bike yesterday and hurt ______ (he). 10. ______ (run) in the morning is good for you.