1,The best time is____

1,The best time is____
A.sunday B.on sunday C weekend D on weekend
为什么可以填AD,BC就不行?
2,be located in,lie on是不是都可以翻译成“位于”?它们有区别吗?
3,问中国十年前的人口,说What's the population of China ten years ago?其中's是is的意思吗?为什么陈述10年前的事情不用过去时要用一般过去时?
4,discuss有没有同义词,四个单词组成的?
5,在报纸上看到一则新闻,是说on the newspaper 还是in the newspaper
6,Li is sitting between Wang Lin and____填I还是me
7,The old and the young ___是用all 还是both?
8,I'm leaving for Beijing the third week in July and staying until August.挑错
9,I‘m going to visit the Great Wall and some other interesting places in Beijing.挑错
10,do you think 做插入语的时候,参考书上说如果do you think后面跟的是个完整的句子就用陈述语序,如果不是完整的句子就要倒装.书上又给了一个句子：What do you think it is used for?“it is used for”算一个完整的句子吗?