将下列句子中的汉语译成英语，注意用词的正确形式。（共5 分）
1、Never ____________ ( 放弃 ) learning English. It’s much too useful.
2、I don’t want to go to Hawaii because it’s too ________（游客很多的）
3、I              (想出) a good idea.
4、There are ____________(至少) eight hundred students on the playground.
5、They stayed at home ______________(而不是)going to the park.