____ you ____I must stay at home,because the baby is sleeping.

____ you ____I must stay at home,because the baby is sleeping.

A.Either or  B both  and  选哪一个 为什么
2.Do you know ____
 A  what it is   B what is it    答案是A  为什么不是B  这里不是what 做主语不变语序吗 这个句子的道理和  what is in the box 一样吗
3.He  won't go with you ____ you ask him to
A  even though  B if  为什么不是B  不是主将从现吗
4.How do you know he is able to play piano so well?
Because I often see him___ in the room
A pratice  B praticing   这句话要选哪个为什么
5.That day I saw some parents ______ at the back of the classroom ______to the teacher.
A sitting;listening  B,B sat;listened   选哪个 为什么

6.Hello,my name is John,I believe you have a room___for me

A waited  B booked  这里答案是B 为什么不能选A 
7.The river through our city  is about_____ long
A.6000 meters long  B 6000-meter-long


thank you very much!