根据句意，用所给词的适当形式填空。 1. We'd like to come. We look forward to ______ (see) you at the party. 2. Amy invites us ______ (visit) the Palace Museum tomorrow. 3. I often exercise ______ (little) than three times a week. 4. — Oh, look at the sun! — Yes. It's a ______ (sun) day today. 5. Mum often makes Kitty ______ (do) her homework before dinner. 6. A policeman ______ (come) and caught the robbers. 7. There are a lot of ______ (shelf) in our school library. 8. My parents left for Beijing on the ______ (twenty) of March. 9. Be ______ (careful)! You must cross the road ______ (careful). 10. It is cloudy. The radio says it ______ (rain) tomorrow.