题目

用连词and, but, or或so填空 （1） The old man wantsto buy this watch, he doesn't have enough money. （2） It's never too cold too hot allthe year round. （3） His name is Peter he is fromEngland. （4） I was hungry, I ate all the foodon the table. （5） Please be quick, you will miss thetrain. 答案：【1】but 【1】or 【1】and 【1】so 【1】or在[-π，π]内，函数为增函数的区间是    ．