宾客使用的烟灰缸中如果存有（）烟蒂，餐厅服务员就必须为宾客撤换烟灰缸。
A.1个
B.2个
C.3个
D.4个
参考答案：B
A．速度不断增大，加速度不断增大
B．速度不断减小，加速度不断增大
C．速度不断增大，加速度不断减小
D．速度不断减小，加速度不断减小
补全对话，每空一词
A： 1
B：I went to the beach.
A： 2
B：It was hot and rainy.
A： 3
B：The people were very friendly.
A：Did you swim？
B： 4 The water is very clean. How about your vacation?
A： 5 I stayed at home and studied for the test.
A. How was the weather?
B. Yes,Idid.
C. What did yoy eat?
D. How were the people?
E. It was boring.
F. How was the book?
G. Where did you go on vacation?
1. ______ 2. ______ 3. ______ 4. ______ 5. ______
