单句语法填空
1．In addition to these traditional activities, we have a wider range of choices such travelling and visiting our relatives or friends.
答案：as
2．With our knowledge (base) on practice, we can make great contributions to our country.
答案：based
3．As the weather (gradual) becomes warmer and warmer, he will pick up soon.
答案：gradually
4．It’s no use (stay) up so late if you don’t devote yourself to your study.
答案：staying
