1.These books __are_ mine .2.Do you have this kind of bag It __is__ very beautiful .
问题描述：
1.These books __are_ mine .2.Do you have this kind of bag It __is__ very beautiful .
3.All my teachers think I __am__ a good student .
4.Tom and Timmy __are_ twin brothers .
5.__Are_ you and your brother in the same school
答
都是正确的,考查的是be动词的适当形式填空.