适当介入
根据句意用适当的介词填空。
1. Look! The man over there is aiming his gun ________ a bird.
2. Thanks ________ your help, I succeeded in finding my lost child.
3. Would you like to go ________ a walk with me in the park?
4. We are all proud ________ our great motherland.
5. I found a bag full ________ money on the way home.
6. I am unfamiliar ________ the man in the room.
7. His father has gone to Hong Kong ________ business.
8. What do you usually do ________ your spare time?
9. He often helps others. ________ instance, he planted trees for Grandpa Li yesterday.
10. As League members, we should not be rude ________ others.

完美无缺
根据短文内容及首字母提示完成短文中所缺的单词,使短文意思连贯、通顺。
        Do you believe that only boys do well in science? Does it seem to you that girls have more vocabularies t_______(1) boys? If your answers are “yes”, you may be right, a_______(2) to an article in Current Science.