一、根据句意及汉语提示完成句子
1．We must study science and____________(科技), or we will fall behind others.
2．The students ran ________(朝) the playground after class.
3．You can't use a ________(枪) to kill animals.
4．The boy found ________ (珠宝)under the tree. He sent it to the police
station.
5．Open your books and turn to ________(页) 28.
