日日人人_亚洲美女在线视频_av手机在线播放_国产大片aaa_欧美中文日韩_午夜理伦三级

  The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

   A. when    B. why    C. whether      D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when            B. why              C. whether              D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when        B. why       C. whether              D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when

B. why

C. whether

D. that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

A. when            B. why              C. whether              D. that

The traditional view is           we sleep because our brain is “programmed”to make us do so.

A．when

B．why

C．whether

D．that

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

 The traditional view is ______ we sleep because our brain is “programmed” to make us do so.

   A. when       B. why           C. whether       D. that

 The traditional view is _______ we sleep because our brain is “programmed” to make us do so.

A. when                         B. why                         C. whether                   D. that