欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

Only in this way ________ to make improvement in the operating system.

A. you can hope 　　　　　　 B. you did hope

C. can you hope 　　　　　　 D. did you hope

Only in this way            to make improvement in the operating system.

A. you can hope              B. you did hope             C. can you hope            D. did you hope

Only in this way _______to make improvement in the operating system.

A. you can hope　　　    B. you did hope　　   C. can you hope　      D. did you hope

Only in this way ________ to make improvement in the operating system.

A. you can hope

B. you did hope

C. can you hope

D. did you hope

A. you can hope

B. you did hope

C. can you hope

D. did you hope

Only in this way _______ to make improvement in the operating system.

Only in this way _______ to make improvement in the operating system.

A．you can hope                          B．can you hope

C．you did hope                           D．did you hope

Only in this way        to make improvement in the operating system.

A．you can hope        B．you did hope        C．can you hope        D．did you hope

Only in this way ________ to make improvement in the operating system.

[　　]