PC机中在CPU与外设的数据传送的三种方式中，DMA方式与中断方式相比，主要优点是______。
参考答案：传输速度快
解析： (略)
I live ____ Park Road. [ ]
A. in
B. on
C. to
时态填空。
1. What are you doing, children? We (make) a snowman.
2. My mother (want) a tube of tooth-paste.
3. There (be) some ice-cream in the refrigerator.
4. Then eat some beans or I can't (give) you any ice-cream.
5. Sue is still (help) her.
