1,You will ___clean your own boots when your jion the army.\A.have B,have to C,must2Another important difference is ___the students in Taiwan have many school.A,THAT B,WHO C,WHEN5They claim that this engine is _____ the previous one.A,twice as powerf

1,You will ___clean your own boots when your jion the army.\A.have B,have to C,must2Another important difference is ___the students in Taiwan have many school.A,THAT B,WHO C,WHEN5They claim that this engine is _____ the previous one.A,twice as powerf
1,You will ___clean your own boots when your jion the army.\
A.have B,have to C,must
2Another important difference is ___the students in Taiwan have many school.
A,THAT B,WHO C,WHEN
5They claim that this engine is _____ the previous one.
A,twice as powerful as B,as twice powerful as C,powerful as twice as D,twice powerful as
6,If Dorothy had not been badly hurt in a car accident,____in the last month's race.
A,she would participate B,she participated C,she would have participated D,she will have participate

1,You will ___clean your own boots when your jion the army.\A.have B,have to C,must2Another important difference is ___the students in Taiwan have many school.A,THAT B,WHO C,WHEN5They claim that this engine is _____ the previous one.A,twice as powerf
1、B
2、A
3、A
4、B
如有不懂,请继续提问.

1. have to 不得不做某事

2. that  
   

B,A

1:have to
2:that
望采纳，谢谢

B have to指不得不，army是军队，军队必须自已刷洗靴子
A 这是个表语从句，而且不缺成分
B not....but 不是。。。而是。。。。因为后面要加从句，所以加that
B 人们讨厌被嘲笑，所以用被动，dislike后用ing形式，嘲笑某人要加at