用所给动词的适当形式填空。
1. When someone ______(give) you a present, you must open it at once.
2. Chinese eat lots of ______(dumpling) at Spring Festival.
3. Can you ______(finish) ______(do) the work?
4. It's impossible ______(understand) what you are trying ______(say).
5. I could see the smoke ______(rise) from the chimney (烟囱)when I ______(walk) past your
house at t his time yesterday.
6. On _____way to school , Jim saw the man fall off his bike .(he)
7. My father likes ______very much .(fish)
