Ⅰ.单句语法填空
1．On the basis of practice，this theory was generally accepted.
2．The volunteers tried to calm the alarmed(alarm) children down.
3．I did some housework for him in exchange for three meals a day.
4．Attracted(attract) by the sweet voice，I walked into the old house.
5．His contribution(contribute) to the world was really admirable.
6．His proposal(propose) was refused by his boss，so he felt a little sad.
7．The girl does two parttime jobs aiming to pay(pay) off her school loan.
8．My mother often reminded me to mind(mind) my manners in public.
9．The incident served as a timely reminder (remind) of just how dangerous mountaineering can be.
10．No matter what happens，he will stick to his goal of entering a key university.
