第一课

非常不好意思，各位

因为录课软件的缘故，我只能发送专栏给大家

因为它录好后不能提取

【知识胶囊】小云给你分享了一个知识胶囊

《bilibilli-1》https://r302.cc/wBNO8mj

链接在这里了

1. Canada is _____ the USA.

    A. north  B. north of  C. on the north of  D. in the north of

2.By the age of thirteen , Linda ____five novels.

   A. wrote  B. has written  C. would write  D. had written

3.The scientist will give a report ____ pollution.

   A. on  B. in  C. at  D. by

好了，题目也来了